252628071989 has 4 divisors (see below), whose sum is σ = 256186213920. Its totient is φ = 249069930060.

The previous prime is 252628071979. The next prime is 252628072019. The reversal of 252628071989 is 989170826252.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 252628071989 - 2⁸ = 252628071733 is a prime.

It is a super-2 number, since 2×252628071989² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252628071919) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1779070859 + ... + 1779071000.

It is an arithmetic number, because the mean of its divisors is an integer number (64046553480).

Almost surely, 2^252628071989 is an apocalyptic number.

It is an amenable number.

252628071989 is a deficient number, since it is larger than the sum of its proper divisors (3558141931).

252628071989 is an equidigital number, since it uses as much as digits as its factorization.

252628071989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3558141930.

The product of its (nonzero) digits is 8709120, while the sum is 59.

The spelling of 252628071989 in words is "two hundred fifty-two billion, six hundred twenty-eight million, seventy-one thousand, nine hundred eighty-nine".