18161056628 has 48 divisors (see below), whose sum is σ = 38625672960. Its totient is φ = 7357257600.

The previous prime is 18161056619. The next prime is 18161056637. The reversal of 18161056628 is 82665016181.

It is an interprime number because it is at equal distance from previous prime (18161056619) and next prime (18161056637).

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 530828 + ... + 564003.

It is an arithmetic number, because the mean of its divisors is an integer number (804701520).

Almost surely, 2^18161056628 is an apocalyptic number.

It is an amenable number.

18161056628 is an abundant number, since it is smaller than the sum of its proper divisors (20464616332).

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

18161056628 is a wasteful number, since it uses less digits than its factorization.

18161056628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1094888 (or 1094886 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 44.

The spelling of 18161056628 in words is "eighteen billion, one hundred sixty-one million, fifty-six thousand, six hundred twenty-eight".