628566057907 has 4 divisors (see below), whose sum is σ = 628568131320. Its totient is φ = 628563984496.

The previous prime is 628566057869. The next prime is 628566057923. The reversal of 628566057907 is 709750665826.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-628566057907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (628566057947) 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, 483613 + ... + 1221070.

It is an arithmetic number, because the mean of its divisors is an integer number (157142032830).

Almost surely, 2^628566057907 is an apocalyptic number.

628566057907 is a deficient number, since it is larger than the sum of its proper divisors (2073413).

628566057907 is a wasteful number, since it uses less digits than its factorization.

628566057907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2073412.

The product of its (nonzero) digits is 38102400, while the sum is 61.

The spelling of 628566057907 in words is "six hundred twenty-eight billion, five hundred sixty-six million, fifty-seven thousand, nine hundred seven".