181655562852 has 18 divisors (see below), whose sum is σ = 459184895078. Its totient is φ = 60551854272.

The previous prime is 181655562821. The next prime is 181655562863. The reversal of 181655562852 is 258265556181.

It is a happy number.

181655562852 is a `hidden beast` number, since 1 + 8 + 1 + 6 + 5 + 5 + 5 + 628 + 5 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 179838757476 + 1816805376 = 424074^2 + 42624^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2522993893 + ... + 2522993964.

Almost surely, 2^181655562852 is an apocalyptic number.

181655562852 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

181655562852 is an abundant number, since it is smaller than the sum of its proper divisors (277529332226).

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

181655562852 is a wasteful number, since it uses less digits than its factorization.

181655562852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5045987867 (or 5045987862 counting only the distinct ones).

The product of its digits is 5760000, while the sum is 54.

The spelling of 181655562852 in words is "one hundred eighty-one billion, six hundred fifty-five million, five hundred sixty-two thousand, eight hundred fifty-two".