12536157442 has 32 divisors (see below), whose sum is σ = 20493603072. Its totient is φ = 5727262464.

The previous prime is 12536157419. The next prime is 12536157443. The reversal of 12536157442 is 24475163521.

It is a super-2 number, since 2×12536157442² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12536157395 and 12536157404.

It is not an unprimeable number, because it can be changed into a prime (12536157443) 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, 571693 + ... + 593215.

It is an arithmetic number, because the mean of its divisors is an integer number (640425096).

Almost surely, 2^12536157442 is an apocalyptic number.

12536157442 is a deficient number, since it is larger than the sum of its proper divisors (7957445630).

12536157442 is a wasteful number, since it uses less digits than its factorization.

12536157442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22042.

The product of its digits is 201600, while the sum is 40.

The spelling of 12536157442 in words is "twelve billion, five hundred thirty-six million, one hundred fifty-seven thousand, four hundred forty-two".