11287945631 has 8 divisors (see below), whose sum is σ = 11357504880. Its totient is φ = 11218563072.

The previous prime is 11287945597. The next prime is 11287945637. The reversal of 11287945631 is 13654978211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11287945631 is a prime.

It is a super-2 number, since 2×11287945631² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11287945637) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85151 + ... + 172703.

It is an arithmetic number, because the mean of its divisors is an integer number (1419688110).

Almost surely, 2^11287945631 is an apocalyptic number.

11287945631 is a deficient number, since it is larger than the sum of its proper divisors (69559249).

11287945631 is an equidigital number, since it uses as much as digits as its factorization.

11287945631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88345.

The product of its digits is 362880, while the sum is 47.

The spelling of 11287945631 in words is "eleven billion, two hundred eighty-seven million, nine hundred forty-five thousand, six hundred thirty-one".