252626116978 has 4 divisors (see below), whose sum is σ = 378939175470. Its totient is φ = 126313058488.

The previous prime is 252626116937. The next prime is 252626116979. The reversal of 252626116978 is 879611626252.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 137438508529 + 115187608449 = 370727^2 + 339393^2 .

It is not an unprimeable number, because it can be changed into a prime (252626116979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63156529243 + ... + 63156529246.

Almost surely, 2^252626116978 is an apocalyptic number.

252626116978 is a deficient number, since it is larger than the sum of its proper divisors (126313058492).

252626116978 is a wasteful number, since it uses less digits than its factorization.

252626116978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126313058491.

The product of its digits is 4354560, while the sum is 55.

The spelling of 252626116978 in words is "two hundred fifty-two billion, six hundred twenty-six million, one hundred sixteen thousand, nine hundred seventy-eight".