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5641621920 = 2533511227523
BaseRepresentation
bin1010100000100010…
…00101000110100000
3112120011201002101000
411100101011012200
543023223400140
62331451312000
7256542665214
oct52021050640
915504632330
105641621920
112435604060
12111544b600
136bba6b32c
143b73a0944
15230446a30
hex1504451a0

5641621920 has 384 divisors, whose sum is σ = 21676999680. Its totient is φ = 1359037440.

The previous prime is 5641621901. The next prime is 5641621927. The reversal of 5641621920 is 291261465.

5641621920 is a `hidden beast` number, since 5 + 6 + 4 + 1 + 621 + 9 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (5641621927) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 10786779 + ... + 10787301.

It is an arithmetic number, because the mean of its divisors is an integer number (56450520).

Almost surely, 25641621920 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5641621920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10838499840).

5641621920 is an abundant number, since it is smaller than the sum of its proper divisors (16035377760).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

5641621920 is a wasteful number, since it uses less digits than its factorization.

5641621920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 785 (or 771 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 5641621920 is about 75110.7310575526. The cubic root of 5641621920 is about 1780.1967042644.

The spelling of 5641621920 in words is "five billion, six hundred forty-one million, six hundred twenty-one thousand, nine hundred twenty".