252551325919978 has 8 divisors (see below), whose sum is σ = 401110929402372. Its totient is φ = 118847682785856.

The previous prime is 252551325919951. The next prime is 252551325919979. The reversal of 252551325919978 is 879919523155252.

It can be written as a sum of positive squares in 2 ways, for example, as 205578903548529 + 46972422371449 = 14338023^2 + 6853643^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 252551325919978.

It is not an unprimeable number, because it can be changed into a prime (252551325919979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3713990087025 + ... + 3713990087092.

Almost surely, 2^{252551325919978} is an apocalyptic number.

252551325919978 is a deficient number, since it is larger than the sum of its proper divisors (148559603482394).

252551325919978 is a wasteful number, since it uses less digits than its factorization.

252551325919978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7427980174136.

The product of its digits is 612360000, while the sum is 73.

The spelling of 252551325919978 in words is "two hundred fifty-two trillion, five hundred fifty-one billion, three hundred twenty-five million, nine hundred nineteen thousand, nine hundred seventy-eight".