628956139917 has 64 divisors (see below), whose sum is σ = 969367246848. Its totient is φ = 355326048000.

The previous prime is 628956139913. The next prime is 628956139961. The reversal of 628956139917 is 719931659826.

It is not a de Polignac number, because 628956139917 - 2² = 628956139913 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628956139913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 576494542 + ... + 576495632.

It is an arithmetic number, because the mean of its divisors is an integer number (15146363232).

Almost surely, 2^628956139917 is an apocalyptic number.

It is an amenable number.

628956139917 is a deficient number, since it is larger than the sum of its proper divisors (340411106931).

628956139917 is a wasteful number, since it uses less digits than its factorization.

628956139917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2050.

The product of its digits is 44089920, while the sum is 66.

The spelling of 628956139917 in words is "six hundred twenty-eight billion, nine hundred fifty-six million, one hundred thirty-nine thousand, nine hundred seventeen".