11171531877 has 16 divisors (see below), whose sum is σ = 16269142080. Its totient is φ = 6762441600.

The previous prime is 11171531863. The next prime is 11171531909. The reversal of 11171531877 is 77813517111.

It is not a de Polignac number, because 11171531877 - 2²⁴ = 11154754661 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11171531837) 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, 176824 + ... + 231537.

It is an arithmetic number, because the mean of its divisors is an integer number (1016821380).

Almost surely, 2^11171531877 is an apocalyptic number.

It is an amenable number.

11171531877 is a deficient number, since it is larger than the sum of its proper divisors (5097610203).

11171531877 is a wasteful number, since it uses less digits than its factorization.

11171531877 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409204.

The product of its digits is 41160, while the sum is 42.

The spelling of 11171531877 in words is "eleven billion, one hundred seventy-one million, five hundred thirty-one thousand, eight hundred seventy-seven".