626445631642405 has 16 divisors (see below), whose sum is σ = 759251919264768. Its totient is φ = 496169935128000.

The previous prime is 626445631642349. The next prime is 626445631642417. The reversal of 626445631642405 is 504246136544626.

It is not a de Polignac number, because 626445631642405 - 2¹³ = 626445631634213 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 626445631642405.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1554215586 + ... + 1554618595.

It is an arithmetic number, because the mean of its divisors is an integer number (47453244954048).

Almost surely, 2^{626445631642405} is an apocalyptic number.

It is an amenable number.

626445631642405 is a deficient number, since it is larger than the sum of its proper divisors (132806287622363).

626445631642405 is a wasteful number, since it uses less digits than its factorization.

626445631642405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3108834588.

The product of its (nonzero) digits is 99532800, while the sum is 58.

The spelling of 626445631642405 in words is "six hundred twenty-six trillion, four hundred forty-five billion, six hundred thirty-one million, six hundred forty-two thousand, four hundred five".