161430633761 has 16 divisors (see below), whose sum is σ = 178377531264. Its totient is φ = 145313059584.

The previous prime is 161430633751. The next prime is 161430633781. The reversal of 161430633761 is 167336034161.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 161430633761 - 2²⁶ = 161363524897 is a prime.

It is a super-2 number, since 2×161430633761² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161430633731) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5034566 + ... + 5066528.

It is an arithmetic number, because the mean of its divisors is an integer number (11148595704).

Almost surely, 2^161430633761 is an apocalyptic number.

It is an amenable number.

161430633761 is a deficient number, since it is larger than the sum of its proper divisors (16946897503).

161430633761 is a wasteful number, since it uses less digits than its factorization.

161430633761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44920.

The product of its (nonzero) digits is 163296, while the sum is 41.

The spelling of 161430633761 in words is "one hundred sixty-one billion, four hundred thirty million, six hundred thirty-three thousand, seven hundred sixty-one".