12172561630761 has 32 divisors (see below), whose sum is σ = 19188553132800. Its totient is φ = 6715798548480.

The previous prime is 12172561630739. The next prime is 12172561630763. The reversal of 12172561630761 is 16703616527121.

It is not a de Polignac number, because 12172561630761 - 2⁹ = 12172561630249 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12172561630761.

It is not an unprimeable number, because it can be changed into a prime (12172561630763) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 68338905 + ... + 68516793.

It is an arithmetic number, because the mean of its divisors is an integer number (599642285400).

Almost surely, 2^{12172561630761} is an apocalyptic number.

It is an amenable number.

12172561630761 is a deficient number, since it is larger than the sum of its proper divisors (7015991502039).

12172561630761 is a wasteful number, since it uses less digits than its factorization.

12172561630761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290289.

The product of its (nonzero) digits is 635040, while the sum is 48.

The spelling of 12172561630761 in words is "twelve trillion, one hundred seventy-two billion, five hundred sixty-one million, six hundred thirty thousand, seven hundred sixty-one".