161611160515516 has 24 divisors (see below), whose sum is σ = 292440088797696. Its totient is φ = 78065730630960.

The previous prime is 161611160515471. The next prime is 161611160515561. The reversal of 161611160515516 is 615515061116161.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (161611160515471) and next prime (161611160515561).

It is a super-2 number, since 2×161611160515516² (a number of 29 digits) contains 22 as substring.

It is a congruent 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, 1110076966 + ... + 1110222541.

It is an arithmetic number, because the mean of its divisors is an integer number (12185003699904).

Almost surely, 2^{161611160515516} is an apocalyptic number.

It is an amenable number.

161611160515516 is a deficient number, since it is larger than the sum of its proper divisors (130828928282180).

161611160515516 is a wasteful number, since it uses less digits than its factorization.

161611160515516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2220300129 (or 2220300127 counting only the distinct ones).

The product of its (nonzero) digits is 162000, while the sum is 46.

The spelling of 161611160515516 in words is "one hundred sixty-one trillion, six hundred eleven billion, one hundred sixty million, five hundred fifteen thousand, five hundred sixteen".