161066111650500 has 96 divisors (see below), whose sum is σ = 536028019607808. Its totient is φ = 36815111232000.

The previous prime is 161066111650459. The next prime is 161066111650553. The reversal of 161066111650500 is 5056111660161.

It is a super-2 number, since 2×161066111650500² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7669804341 + ... + 7669825340.

It is an arithmetic number, because the mean of its divisors is an integer number (5583625204248).

Almost surely, 2^{161066111650500} is an apocalyptic number.

161066111650500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161066111650500 is an abundant number, since it is smaller than the sum of its proper divisors (374961907957308).

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

161066111650500 is a wasteful number, since it uses less digits than its factorization.

161066111650500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15339629710 (or 15339629698 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 39.

The spelling of 161066111650500 in words is "one hundred sixty-one trillion, sixty-six billion, one hundred eleven million, six hundred fifty thousand, five hundred".