15120987760 has 40 divisors (see below), whose sum is σ = 35313989760. Its totient is φ = 6021265152.

The previous prime is 15120987731. The next prime is 15120987767. The reversal of 15120987760 is 6778902151.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 15120987760.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15120987767) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 405955 + ... + 441634.

It is an arithmetic number, because the mean of its divisors is an integer number (882849744).

Almost surely, 2^15120987760 is an apocalyptic number.

15120987760 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15120987760 is an abundant number, since it is smaller than the sum of its proper divisors (20193002000).

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

15120987760 is a wasteful number, since it uses less digits than its factorization.

15120987760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 847825 (or 847819 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 46.

The spelling of 15120987760 in words is "fifteen billion, one hundred twenty million, nine hundred eighty-seven thousand, seven hundred sixty".