13425692978 has 16 divisors (see below), whose sum is σ = 20279813400. Its totient is φ = 6665782656.

The previous prime is 13425692977. The next prime is 13425692989. The reversal of 13425692978 is 87929652431.

It can be written as a sum of positive squares in 4 ways, for example, as 1121781049 + 12303911929 = 33493^2 + 110923^2 .

It is not an unprimeable number, because it can be changed into a prime (13425692977) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1705700 + ... + 1713552.

Almost surely, 2^13425692978 is an apocalyptic number.

13425692978 is a deficient number, since it is larger than the sum of its proper divisors (6854120422).

13425692978 is a wasteful number, since it uses less digits than its factorization.

13425692978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13741.

The product of its digits is 6531840, while the sum is 56.

The spelling of 13425692978 in words is "thirteen billion, four hundred twenty-five million, six hundred ninety-two thousand, nine hundred seventy-eight".