12555878734 has 32 divisors (see below), whose sum is σ = 22797567936. Its totient is φ = 5062986240.

The previous prime is 12555878681. The next prime is 12555878761. The reversal of 12555878734 is 43787855521.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1046232 + ... + 1058164.

It is an arithmetic number, because the mean of its divisors is an integer number (712423998).

Almost surely, 2^12555878734 is an apocalyptic number.

12555878734 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

12555878734 is a deficient number, since it is larger than the sum of its proper divisors (10241689202).

12555878734 is a wasteful number, since it uses less digits than its factorization.

12555878734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16380.

The product of its digits is 9408000, while the sum is 55.

The spelling of 12555878734 in words is "twelve billion, five hundred fifty-five million, eight hundred seventy-eight thousand, seven hundred thirty-four".