625404131623 has 4 divisors (see below), whose sum is σ = 625423356040. Its totient is φ = 625384907208.

The previous prime is 625404131617. The next prime is 625404131629. The reversal of 625404131623 is 326131404526.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (625404131617) and next prime (625404131629).

It is a cyclic number.

It is not a de Polignac number, because 625404131623 - 2⁵ = 625404131591 is a prime.

It is a super-2 number, since 2×625404131623² (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 (625404131629) 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, 9563328 + ... + 9628501.

It is an arithmetic number, because the mean of its divisors is an integer number (156355839010).

Almost surely, 2^625404131623 is an apocalyptic number.

625404131623 is a deficient number, since it is larger than the sum of its proper divisors (19224417).

625404131623 is a wasteful number, since it uses less digits than its factorization.

625404131623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19224416.

The product of its (nonzero) digits is 103680, while the sum is 37.

The spelling of 625404131623 in words is "six hundred twenty-five billion, four hundred four million, one hundred thirty-one thousand, six hundred twenty-three".