15265136720 has 20 divisors (see below), whose sum is σ = 35491443060. Its totient is φ = 6106054656.

The previous prime is 15265136713. The next prime is 15265136743. The reversal of 15265136720 is 2763156251.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 10750371856 + 4514764864 = 103684^2 + 67192^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 95407025 + ... + 95407184.

It is an arithmetic number, because the mean of its divisors is an integer number (1774572153).

Almost surely, 2^15265136720 is an apocalyptic number.

15265136720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15265136720 is an abundant number, since it is smaller than the sum of its proper divisors (20226306340).

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

15265136720 is a wasteful number, since it uses less digits than its factorization.

15265136720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190814222 (or 190814216 counting only the distinct ones).

The product of its (nonzero) digits is 75600, while the sum is 38.

The spelling of 15265136720 in words is "fifteen billion, two hundred sixty-five million, one hundred thirty-six thousand, seven hundred twenty".