11477156531 has 4 divisors (see below), whose sum is σ = 11744067192. Its totient is φ = 11210245872.

The previous prime is 11477156477. The next prime is 11477156533. The reversal of 11477156531 is 13565177411.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13565177411 = 31123 ⋅435857.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11477156531 is a prime.

It is a super-2 number, since 2×11477156531² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11477156533) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 133455266 + ... + 133455351.

It is an arithmetic number, because the mean of its divisors is an integer number (2936016798).

Almost surely, 2^11477156531 is an apocalyptic number.

11477156531 is a deficient number, since it is larger than the sum of its proper divisors (266910661).

11477156531 is an equidigital number, since it uses as much as digits as its factorization.

11477156531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266910660.

The product of its digits is 88200, while the sum is 41.

The spelling of 11477156531 in words is "eleven billion, four hundred seventy-seven million, one hundred fifty-six thousand, five hundred thirty-one".