11557647542 has 24 divisors (see below), whose sum is σ = 20185487064. Its totient is φ = 4948716192.

The previous prime is 11557647539. The next prime is 11557647553. The reversal of 11557647542 is 24574675511.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 53753 + ... + 161259.

It is an arithmetic number, because the mean of its divisors is an integer number (841061961).

Almost surely, 2^11557647542 is an apocalyptic number.

It is a pronic number, being equal to 107506×107507.

11557647542 is a deficient number, since it is larger than the sum of its proper divisors (8627839522).

11557647542 is a wasteful number, since it uses less digits than its factorization.

11557647542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108620 (or 108613 counting only the distinct ones).

The product of its digits is 1176000, while the sum is 47.

The spelling of 11557647542 in words is "eleven billion, five hundred fifty-seven million, six hundred forty-seven thousand, five hundred forty-two".