625161212621 has 16 divisors (see below), whose sum is σ = 688992955200. Its totient is φ = 562507200000.

The previous prime is 625161212587. The next prime is 625161212629. The reversal of 625161212621 is 126212161526.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-625161212621 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (625161212629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 833246 + ... + 1394496.

It is an arithmetic number, because the mean of its divisors is an integer number (43062059700).

Almost surely, 2^625161212621 is an apocalyptic number.

It is an amenable number.

625161212621 is a deficient number, since it is larger than the sum of its proper divisors (63831742579).

625161212621 is a wasteful number, since it uses less digits than its factorization.

625161212621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 562300.

The product of its digits is 17280, while the sum is 35.

The spelling of 625161212621 in words is "six hundred twenty-five billion, one hundred sixty-one million, two hundred twelve thousand, six hundred twenty-one".