16115571234901 has 2 divisors, whose sum is σ = 16115571234902. Its totient is φ = 16115571234900.

The previous prime is 16115571234887. The next prime is 16115571234907. The reversal of 16115571234901 is 10943217551161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11648562174001 + 4467009060900 = 3412999^2 + 2113530^2 .

It is a cyclic number.

It is not a de Polignac number, because 16115571234901 - 2²⁵ = 16115537680469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16115571234907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8057785617450 + 8057785617451.

It is an arithmetic number, because the mean of its divisors is an integer number (8057785617451).

Almost surely, 2^{16115571234901} is an apocalyptic number.

It is an amenable number.

16115571234901 is a deficient number, since it is larger than the sum of its proper divisors (1).

16115571234901 is an equidigital number, since it uses as much as digits as its factorization.

16115571234901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 226800, while the sum is 46.

The spelling of 16115571234901 in words is "sixteen trillion, one hundred fifteen billion, five hundred seventy-one million, two hundred thirty-four thousand, nine hundred one".