628407004481 has 4 divisors (see below), whose sum is σ = 628410219264. Its totient is φ = 628403789700.

The previous prime is 628407004447. The next prime is 628407004493. The reversal of 628407004481 is 184400704826.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-628407004481 is a prime.

It is a super-2 number, since 2×628407004481² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (628407004681) 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, 1293785 + ... + 1711926.

It is an arithmetic number, because the mean of its divisors is an integer number (157102554816).

Almost surely, 2^628407004481 is an apocalyptic number.

It is an amenable number.

628407004481 is a deficient number, since it is larger than the sum of its proper divisors (3214783).

628407004481 is a wasteful number, since it uses less digits than its factorization.

628407004481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3214782.

The product of its (nonzero) digits is 344064, while the sum is 44.

The spelling of 628407004481 in words is "six hundred twenty-eight billion, four hundred seven million, four thousand, four hundred eighty-one".