13142928978 has 24 divisors (see below), whose sum is σ = 28728353628. Its totient is φ = 4342205952.

The previous prime is 13142928977. The next prime is 13142929001. The reversal of 13142928978 is 87982924131.

13142928978 is a `hidden beast` number, since 131 + 429 + 2 + 89 + 7 + 8 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 12180874689 + 962054289 = 110367^2 + 31017^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13142928977) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3228775 + ... + 3232842.

Almost surely, 2^13142928978 is an apocalyptic number.

13142928978 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

13142928978 is an abundant number, since it is smaller than the sum of its proper divisors (15585424650).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13142928978 is a wasteful number, since it uses less digits than its factorization.

13142928978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6461738 (or 6461735 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 54.

The spelling of 13142928978 in words is "thirteen billion, one hundred forty-two million, nine hundred twenty-eight thousand, nine hundred seventy-eight".