12780937015 has 32 divisors (see below), whose sum is σ = 19482425856. Its totient is φ = 7816997760.

The previous prime is 12780936979. The next prime is 12780937063. The reversal of 12780937015 is 51073908721.

It is not a de Polignac number, because 12780937015 - 2⁷ = 12780936887 is a prime.

It is a super-2 number, since 2×12780937015² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 292777 + ... + 333586.

It is an arithmetic number, because the mean of its divisors is an integer number (608825808).

Almost surely, 2^12780937015 is an apocalyptic number.

12780937015 is a deficient number, since it is larger than the sum of its proper divisors (6701488841).

12780937015 is a wasteful number, since it uses less digits than its factorization.

12780937015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 626439.

The product of its (nonzero) digits is 105840, while the sum is 43.

The spelling of 12780937015 in words is "twelve billion, seven hundred eighty million, nine hundred thirty-seven thousand, fifteen".