5921864640 has 280 divisors, whose sum is σ = 21517733952. Its totient is φ = 1545246720.

The previous prime is 5921864639. The next prime is 5921864651. The reversal of 5921864640 is 464681295.

5921864640 is a `hidden beast` number, since 5 + 9 + 2 + 186 + 464 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1215810 + ... + 1220670.

Almost surely, 2^5921864640 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 5921864640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10758866976).

5921864640 is an abundant number, since it is smaller than the sum of its proper divisors (15595869312).

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

5921864640 is a wasteful number, since it uses less digits than its factorization.

5921864640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4937 (or 4918 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 45.

The square root of 5921864640 is about 76953.6525448922. The cubic root of 5921864640 is about 1809.1982489429.

The spelling of 5921864640 in words is "five billion, nine hundred twenty-one million, eight hundred sixty-four thousand, six hundred forty".