628902118181 has 4 divisors (see below), whose sum is σ = 630302791500. Its totient is φ = 627501444864.

The previous prime is 628902118093. The next prime is 628902118213. The reversal of 628902118181 is 181811209826.

628902118181 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 181811209826 = 2 ⋅90905604913.

It can be written as a sum of positive squares in 2 ways, for example, as 274716449956 + 354185668225 = 524134^2 + 595135^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-628902118181 is a prime.

It is a super-2 number, since 2×628902118181² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628902318181) 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, 700335986 + ... + 700336883.

It is an arithmetic number, because the mean of its divisors is an integer number (157575697875).

Almost surely, 2^628902118181 is an apocalyptic number.

It is an amenable number.

628902118181 is a deficient number, since it is larger than the sum of its proper divisors (1400673319).

628902118181 is a wasteful number, since it uses less digits than its factorization.

628902118181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1400673318.

The product of its (nonzero) digits is 110592, while the sum is 47.

The spelling of 628902118181 in words is "six hundred twenty-eight billion, nine hundred two million, one hundred eighteen thousand, one hundred eighty-one".