161500066055555 has 8 divisors (see below), whose sum is σ = 198526910468544. Its totient is φ = 126048832043200.

The previous prime is 161500066055501. The next prime is 161500066055567. The reversal of 161500066055555 is 555550660005161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 161500066055555 - 2⁸ = 161500066055299 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 393902599931 + ... + 393902600340.

It is an arithmetic number, because the mean of its divisors is an integer number (24815863808568).

Almost surely, 2^{161500066055555} is an apocalyptic number.

161500066055555 is a deficient number, since it is larger than the sum of its proper divisors (37026844412989).

161500066055555 is an equidigital number, since it uses as much as digits as its factorization.

161500066055555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 787805200317.

The product of its (nonzero) digits is 3375000, while the sum is 50.

The spelling of 161500066055555 in words is "one hundred sixty-one trillion, five hundred billion, sixty-six million, fifty-five thousand, five hundred fifty-five".