12161625722 has 16 divisors (see below), whose sum is σ = 18324637992. Its totient is φ = 6053452800.

The previous prime is 12161625689. The next prime is 12161625727. The reversal of 12161625722 is 22752616121.

It can be written as a sum of positive squares in 4 ways, for example, as 8405039041 + 3756586681 = 91679^2 + 61291^2 .

It is not an unprimeable number, because it can be changed into a prime (12161625727) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 651722 + ... + 670122.

Almost surely, 2^12161625722 is an apocalyptic number.

12161625722 is a deficient number, since it is larger than the sum of its proper divisors (6163012270).

12161625722 is a wasteful number, since it uses less digits than its factorization.

12161625722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19873.

The product of its digits is 20160, while the sum is 35.

The spelling of 12161625722 in words is "twelve billion, one hundred sixty-one million, six hundred twenty-five thousand, seven hundred twenty-two".