15622920720 has 120 divisors (see below), whose sum is σ = 57236729472. Its totient is φ = 3787372800.

The previous prime is 15622920697. The next prime is 15622920721. The reversal of 15622920720 is 2702922651.

It is a happy number.

15622920720 is a `hidden beast` number, since 1 + 5 + 622 + 9 + 2 + 0 + 7 + 20 = 666.

It is a tau number, because it is divible by the number of its divisors (120).

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 (15622920721) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 978376 + ... + 994215.

Almost surely, 2^15622920720 is an apocalyptic number.

15622920720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15622920720 is an abundant number, since it is smaller than the sum of its proper divisors (41613808752).

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

15622920720 is a wasteful number, since it uses less digits than its factorization.

15622920720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1972621 (or 1972612 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The spelling of 15622920720 in words is "fifteen billion, six hundred twenty-two million, nine hundred twenty thousand, seven hundred twenty".