628777071938 has 16 divisors (see below), whose sum is σ = 993938003520. Its totient is φ = 297502140816.

The previous prime is 628777071917. The next prime is 628777071947. The reversal of 628777071938 is 839170777826.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9400406 + ... + 9467057.

It is an arithmetic number, because the mean of its divisors is an integer number (62121125220).

Almost surely, 2^628777071938 is an apocalyptic number.

628777071938 is a deficient number, since it is larger than the sum of its proper divisors (365160931582).

628777071938 is a wasteful number, since it uses less digits than its factorization.

628777071938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18868361.

The product of its (nonzero) digits is 49787136, while the sum is 65.

The spelling of 628777071938 in words is "six hundred twenty-eight billion, seven hundred seventy-seven million, seventy-one thousand, nine hundred thirty-eight".