252628931991 has 8 divisors (see below), whose sum is σ = 337002655600. Its totient is φ = 168337248192.

The previous prime is 252628931983. The next prime is 252628931993. The reversal of 252628931991 is 199139826252.

It is a happy number.

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

It is not a de Polignac number, because 252628931991 - 2³ = 252628931983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252628931993) 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 7 ways as a sum of consecutive naturals, for example, 20502766 + ... + 20515083.

It is an arithmetic number, because the mean of its divisors is an integer number (42125331950).

Almost surely, 2^252628931991 is an apocalyptic number.

252628931991 is a deficient number, since it is larger than the sum of its proper divisors (84373723609).

252628931991 is a wasteful number, since it uses less digits than its factorization.

252628931991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41019905.

The product of its digits is 4199040, while the sum is 57.

The spelling of 252628931991 in words is "two hundred fifty-two billion, six hundred twenty-eight million, nine hundred thirty-one thousand, nine hundred ninety-one".