16071516992081 has 2 divisors, whose sum is σ = 16071516992082. Its totient is φ = 16071516992080.

The previous prime is 16071516991993. The next prime is 16071516992173. The reversal of 16071516992081 is 18029961517061.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14730888791056 + 1340628201025 = 3838084^2 + 1157855^2 .

It is a cyclic number.

It is not a de Polignac number, because 16071516992081 - 2²² = 16071512797777 is a prime.

It is a super-2 number, since 2×16071516992081² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (16071516995081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8035758496040 + 8035758496041.

It is an arithmetic number, because the mean of its divisors is an integer number (8035758496041).

Almost surely, 2^{16071516992081} is an apocalyptic number.

It is an amenable number.

16071516992081 is a deficient number, since it is larger than the sum of its proper divisors (1).

16071516992081 is an equidigital number, since it uses as much as digits as its factorization.

16071516992081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1632960, while the sum is 56.

The spelling of 16071516992081 in words is "sixteen trillion, seventy-one billion, five hundred sixteen million, nine hundred ninety-two thousand, eighty-one".