628407004681 has 2 divisors, whose sum is σ = 628407004682. Its totient is φ = 628407004680.

The previous prime is 628407004649. The next prime is 628407004783. The reversal of 628407004681 is 186400704826.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 497435394681 + 130971610000 = 705291^2 + 361900^2 .

It is a cyclic number.

It is not a de Polignac number, because 628407004681 - 2⁵ = 628407004649 is a prime.

It is a super-2 number, since 2×628407004681² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (628407074681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314203502340 + 314203502341.

It is an arithmetic number, because the mean of its divisors is an integer number (314203502341).

Almost surely, 2^628407004681 is an apocalyptic number.

It is an amenable number.

628407004681 is a deficient number, since it is larger than the sum of its proper divisors (1).

628407004681 is an equidigital number, since it uses as much as digits as its factorization.

628407004681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 516096, while the sum is 46.

The spelling of 628407004681 in words is "six hundred twenty-eight billion, four hundred seven million, four thousand, six hundred eighty-one".