12978431086 has 8 divisors (see below), whose sum is σ = 19468824264. Its totient is φ = 6488823000.

The previous prime is 12978431047. The next prime is 12978431171. The reversal of 12978431086 is 68013487921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×12978431086² (a number of 21 digits) contains 22 as substring.

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, 153040 + ... + 222211.

It is an arithmetic number, because the mean of its divisors is an integer number (2433603033).

Almost surely, 2^12978431086 is an apocalyptic number.

12978431086 is a deficient number, since it is larger than the sum of its proper divisors (6490393178).

12978431086 is a wasteful number, since it uses less digits than its factorization.

12978431086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392546.

The product of its (nonzero) digits is 580608, while the sum is 49.

The spelling of 12978431086 in words is "twelve billion, nine hundred seventy-eight million, four hundred thirty-one thousand, eighty-six".