13120365015 has 80 divisors (see below), whose sum is σ = 23857347360. Its totient is φ = 6897623040.

The previous prime is 13120365007. The next prime is 13120365053. The reversal of 13120365015 is 51056302131.

13120365015 is a `hidden beast` number, since 1 + 3 + 1 + 2 + 0 + 3 + 650 + 1 + 5 = 666.

It is not a de Polignac number, because 13120365015 - 2³ = 13120365007 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 13120365015.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 13002831 + ... + 13003839.

It is an arithmetic number, because the mean of its divisors is an integer number (298216842).

Almost surely, 2^13120365015 is an apocalyptic number.

13120365015 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

13120365015 is a deficient number, since it is larger than the sum of its proper divisors (10736982345).

13120365015 is a wasteful number, since it uses less digits than its factorization.

13120365015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1454 (or 1445 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 27.

Adding to 13120365015 its reverse (51056302131), we get a palindrome (64176667146).

The spelling of 13120365015 in words is "thirteen billion, one hundred twenty million, three hundred sixty-five thousand, fifteen".