991552411131 has 8 divisors (see below), whose sum is σ = 1379551180800. Its totient is φ = 632294291112.

The previous prime is 991552411111. The next prime is 991552411139. The reversal of 991552411131 is 131114255199.

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

It is not a de Polignac number, because 991552411131 - 2¹⁴ = 991552394747 is a prime.

It is a super-2 number, since 2×991552411131² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (991552411139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7185162331 + ... + 7185162468.

It is an arithmetic number, because the mean of its divisors is an integer number (172443897600).

Almost surely, 2^991552411131 is an apocalyptic number.

991552411131 is a deficient number, since it is larger than the sum of its proper divisors (387998769669).

991552411131 is a wasteful number, since it uses less digits than its factorization.

991552411131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14370324825.

The product of its digits is 48600, while the sum is 42.

The spelling of 991552411131 in words is "nine hundred ninety-one billion, five hundred fifty-two million, four hundred eleven thousand, one hundred thirty-one".