5921621280 has 72 divisors (see below), whose sum is σ = 20207537532. Its totient is φ = 1579098624.

The previous prime is 5921621261. The next prime is 5921621287. The reversal of 5921621280 is 821261295.

5921621280 is a `hidden beast` number, since 5 + 9 + 2 + 1 + 621 + 28 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 5914840464 + 6780816 = 76908^2 + 2604^2 .

It is a tau number, because it is divible by the number of its divisors (72).

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 (5921621287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2054679 + ... + 2057558.

Almost surely, 2^5921621280 is an apocalyptic number.

It is an amenable number.

5921621280 is an abundant number, since it is smaller than the sum of its proper divisors (14285916252).

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

5921621280 is a wasteful number, since it uses less digits than its factorization.

5921621280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4112258 (or 4112247 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 5921621280 is about 76952.0713171517. The cubic root of 5921621280 is about 1809.1734655037.

The spelling of 5921621280 in words is "five billion, nine hundred twenty-one million, six hundred twenty-one thousand, two hundred eighty".