252312029195978 has 4 divisors (see below), whose sum is σ = 378468043793970. Its totient is φ = 126156014597988.

The previous prime is 252312029195959. The next prime is 252312029196041. The reversal of 252312029195978 is 879591920213252.

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., 222212179409089 + 30099849786889 = 14906783^2 + 5486333^2 .

It is a super-2 number, since 2×252312029195978² (a number of 30 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63078007298993 + ... + 63078007298996.

Almost surely, 2^{252312029195978} is an apocalyptic number.

252312029195978 is a deficient number, since it is larger than the sum of its proper divisors (126156014597992).

252312029195978 is a wasteful number, since it uses less digits than its factorization.

252312029195978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126156014597991.

The product of its (nonzero) digits is 48988800, while the sum is 65.

The spelling of 252312029195978 in words is "two hundred fifty-two trillion, three hundred twelve billion, twenty-nine million, one hundred ninety-five thousand, nine hundred seventy-eight".