52031815778 has 4 divisors (see below), whose sum is σ = 78047723670. Its totient is φ = 26015907888.

The previous prime is 52031815763. The next prime is 52031815853. The reversal of 52031815778 is 87751813025.

It is a happy number.

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., 32499796729 + 19532019049 = 180277^2 + 139757^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13007953943 + ... + 13007953946.

Almost surely, 2^52031815778 is an apocalyptic number.

52031815778 is a deficient number, since it is larger than the sum of its proper divisors (26015907892).

52031815778 is a wasteful number, since it uses less digits than its factorization.

52031815778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26015907891.

The product of its (nonzero) digits is 470400, while the sum is 47.

The spelling of 52031815778 in words is "fifty-two billion, thirty-one million, eight hundred fifteen thousand, seven hundred seventy-eight".