626939945 has 16 divisors (see below), whose sum is σ = 759779328. Its totient is φ = 496601280.

The previous prime is 626939867. The next prime is 626939947. The reversal of 626939945 is 549939626.

It is not a de Polignac number, because 626939945 - 2¹⁸ = 626677801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (626939947) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 613535 + ... + 614555.

It is an arithmetic number, because the mean of its divisors is an integer number (47486208).

Almost surely, 2^626939945 is an apocalyptic number.

It is an amenable number.

626939945 is a deficient number, since it is larger than the sum of its proper divisors (132839383).

626939945 is a wasteful number, since it uses less digits than its factorization.

626939945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2120.

The product of its digits is 3149280, while the sum is 53.

The square root of 626939945 is about 25038.7688395416. The cubic root of 626939945 is about 855.8716621473.

The spelling of 626939945 in words is "six hundred twenty-six million, nine hundred thirty-nine thousand, nine hundred forty-five".