12156572106 has 24 divisors (see below), whose sum is σ = 30101988384. Its totient is φ = 3473306280.

The previous prime is 12156572101. The next prime is 12156572107. The reversal of 12156572106 is 60127565121.

12156572106 is a `hidden beast` number, since 1 + 21 + 56 + 572 + 10 + 6 = 666.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12156572101) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 48240240 + ... + 48240491.

It is an arithmetic number, because the mean of its divisors is an integer number (1254249516).

Almost surely, 2^12156572106 is an apocalyptic number.

12156572106 is an abundant number, since it is smaller than the sum of its proper divisors (17945416278).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12156572106 is a wasteful number, since it uses less digits than its factorization.

12156572106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96480746 (or 96480743 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 36.

The spelling of 12156572106 in words is "twelve billion, one hundred fifty-six million, five hundred seventy-two thousand, one hundred six".