181064535660 has 36 divisors (see below), whose sum is σ = 549229092048. Its totient is φ = 48283876128.

The previous prime is 181064535653. The next prime is 181064535671. The reversal of 181064535660 is 66535460181.

181064535660 is a `hidden beast` number, since 1 + 8 + 106 + 4 + 535 + 6 + 6 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 502956864 + ... + 502957223.

It is an arithmetic number, because the mean of its divisors is an integer number (15256363668).

Almost surely, 2^181064535660 is an apocalyptic number.

181064535660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

181064535660 is an abundant number, since it is smaller than the sum of its proper divisors (368164556388).

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

181064535660 is a wasteful number, since it uses less digits than its factorization.

181064535660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1005914102 (or 1005914097 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 45.

The spelling of 181064535660 in words is "one hundred eighty-one billion, sixty-four million, five hundred thirty-five thousand, six hundred sixty".