12611633157 has 12 divisors (see below), whose sum is σ = 18239670540. Its totient is φ = 8397201408.

The previous prime is 12611633143. The next prime is 12611633191. The reversal of 12611633157 is 75133611621.

12611633157 is a `hidden beast` number, since 1 + 2 + 6 + 1 + 1 + 633 + 15 + 7 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 7016742756 + 5594890401 = 83766^2 + 74799^2 .

It is not a de Polignac number, because 12611633157 - 2¹⁸ = 12611371013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12611633197) 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, 871932 + ... + 886277.

It is an arithmetic number, because the mean of its divisors is an integer number (1519972545).

Almost surely, 2^12611633157 is an apocalyptic number.

It is an amenable number.

12611633157 is a deficient number, since it is larger than the sum of its proper divisors (5628037383).

12611633157 is a wasteful number, since it uses less digits than its factorization.

12611633157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1759012 (or 1759009 counting only the distinct ones).

The product of its digits is 22680, while the sum is 36.

The spelling of 12611633157 in words is "twelve billion, six hundred eleven million, six hundred thirty-three thousand, one hundred fifty-seven".