16156465661 has 24 divisors (see below), whose sum is σ = 19915004736. Its totient is φ = 13023830400.

The previous prime is 16156465609. The next prime is 16156465727. The reversal of 16156465661 is 16656465161.

It is not a de Polignac number, because 16156465661 - 2³⁰ = 15082723837 is a prime.

It is a super-2 number, since 2×16156465661² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16156465261) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1202000 + ... + 1215366.

It is an arithmetic number, because the mean of its divisors is an integer number (829791864).

Almost surely, 2^16156465661 is an apocalyptic number.

It is an amenable number.

16156465661 is a deficient number, since it is larger than the sum of its proper divisors (3758539075).

16156465661 is a wasteful number, since it uses less digits than its factorization.

16156465661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14849 (or 14842 counting only the distinct ones).

The product of its digits is 777600, while the sum is 47.

The spelling of 16156465661 in words is "sixteen billion, one hundred fifty-six million, four hundred sixty-five thousand, six hundred sixty-one".