11481375631 has 4 divisors (see below), whose sum is σ = 12525137064. Its totient is φ = 10437614200.

The previous prime is 11481375623. The next prime is 11481375671. The reversal of 11481375631 is 13657318411.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11481375631 - 2³ = 11481375623 is a prime.

It is a super-3 number, since 3×11481375631³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11481375611) 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, 521880700 + ... + 521880721.

It is an arithmetic number, because the mean of its divisors is an integer number (3131284266).

Almost surely, 2^11481375631 is an apocalyptic number.

11481375631 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11481375631 is a deficient number, since it is larger than the sum of its proper divisors (1043761433).

11481375631 is a wasteful number, since it uses less digits than its factorization.

11481375631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1043761432.

The product of its digits is 60480, while the sum is 40.

The spelling of 11481375631 in words is "eleven billion, four hundred eighty-one million, three hundred seventy-five thousand, six hundred thirty-one".