11631581131 has 8 divisors (see below), whose sum is σ = 11749928960. Its totient is φ = 11513651688.

The previous prime is 11631581107. The next prime is 11631581149. The reversal of 11631581131 is 13118513611.

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

It is a cyclic number.

It is not a de Polignac number, because 11631581131 - 2¹¹ = 11631579083 is a prime.

It is a super-4 number, since 4×11631581131⁴ (a number of 41 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11631581093 and 11631581102.

It is not an unprimeable number, because it can be changed into a prime (11631581231) 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, 48561 + ... + 160066.

It is an arithmetic number, because the mean of its divisors is an integer number (1468741120).

Almost surely, 2^11631581131 is an apocalyptic number.

11631581131 is a deficient number, since it is larger than the sum of its proper divisors (118347829).

11631581131 is a wasteful number, since it uses less digits than its factorization.

11631581131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209193.

The product of its digits is 2160, while the sum is 31.

The spelling of 11631581131 in words is "eleven billion, six hundred thirty-one million, five hundred eighty-one thousand, one hundred thirty-one".