42596635491 has 12 divisors (see below), whose sum is σ = 61686649440. Its totient is φ = 28324752720.

The previous prime is 42596635481. The next prime is 42596635511. The reversal of 42596635491 is 19453669524.

42596635491 is a `hidden beast` number, since 4 + 2 + 5 + 96 + 6 + 3 + 549 + 1 = 666.

It is not a de Polignac number, because 42596635491 - 2⁶ = 42596635427 is a prime.

It is a super-2 number, since 2×42596635491² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (42596635441) 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, 6079995 + ... + 6086996.

It is an arithmetic number, because the mean of its divisors is an integer number (5140554120).

Almost surely, 2^42596635491 is an apocalyptic number.

42596635491 is a deficient number, since it is larger than the sum of its proper divisors (19090013949).

42596635491 is a wasteful number, since it uses less digits than its factorization.

42596635491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12167386 (or 12167383 counting only the distinct ones).

The product of its digits is 6998400, while the sum is 54.

The spelling of 42596635491 in words is "forty-two billion, five hundred ninety-six million, six hundred thirty-five thousand, four hundred ninety-one".