5421265920 has 462 divisors, whose sum is σ = 21915276162. Its totient is φ = 1239146496.

The previous prime is 5421265909. The next prime is 5421265933. The reversal of 5421265920 is 295621245.

5421265920 is a `hidden beast` number, since 5 + 42 + 1 + 26 + 592 + 0 = 666.

It can be written as a sum of positive squares in only one way, i.e., 4337012736 + 1084253184 = 65856^2 + 32928^2 .

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 41 ways as a sum of consecutive naturals, for example, 774466557 + ... + 774466563.

Almost surely, 2^5421265920 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 5421265920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10957638081).

5421265920 is an abundant number, since it is smaller than the sum of its proper divisors (16494010242).

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

5421265920 is an frugal number, since it uses more digits than its factorization.

5421265920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73 (or 17 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The square root of 5421265920 is about 73629.2463631131. The cubic root of 5421265920 is about 1756.7106606504.

The spelling of 5421265920 in words is "five billion, four hundred twenty-one million, two hundred sixty-five thousand, nine hundred twenty".