11531776634 has 32 divisors (see below), whose sum is σ = 21040166016. Its totient is φ = 4627353600.

The previous prime is 11531776621. The next prime is 11531776649. The reversal of 11531776634 is 43667713511.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 79592 + ... + 171459.

It is an arithmetic number, because the mean of its divisors is an integer number (657505188).

Almost surely, 2^11531776634 is an apocalyptic number.

11531776634 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

11531776634 is a deficient number, since it is larger than the sum of its proper divisors (9508389382).

11531776634 is a wasteful number, since it uses less digits than its factorization.

11531776634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251270.

The product of its digits is 317520, while the sum is 44.

The spelling of 11531776634 in words is "eleven billion, five hundred thirty-one million, seven hundred seventy-six thousand, six hundred thirty-four".