628856591650 has 192 divisors, whose sum is σ = 1443345120000. Its totient is φ = 199015833600.

The previous prime is 628856591647. The next prime is 628856591681. The reversal of 628856591650 is 56195658826.

It is a happy number.

It is a super-2 number, since 2×628856591650² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 405975076 + ... + 405976624.

It is an arithmetic number, because the mean of its divisors is an integer number (7517422500).

Almost surely, 2^628856591650 is an apocalyptic number.

628856591650 is an abundant number, since it is smaller than the sum of its proper divisors (814488528350).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

628856591650 is a wasteful number, since it uses less digits than its factorization.

628856591650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3117 (or 3112 counting only the distinct ones).

The product of its (nonzero) digits is 31104000, while the sum is 61.

The spelling of 628856591650 in words is "six hundred twenty-eight billion, eight hundred fifty-six million, five hundred ninety-one thousand, six hundred fifty".