11580661533631 has 2 divisors, whose sum is σ = 11580661533632. Its totient is φ = 11580661533630.

The previous prime is 11580661533613. The next prime is 11580661533659. The reversal of 11580661533631 is 13633516608511.

Together with previous prime (11580661533613) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11580661533631 - 2⁷ = 11580661533503 is a prime.

It is a super-2 number, since 2×11580661533631² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11580661533691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5790330766815 + 5790330766816.

It is an arithmetic number, because the mean of its divisors is an integer number (5790330766816).

Almost surely, 2^{11580661533631} is an apocalyptic number.

11580661533631 is a deficient number, since it is larger than the sum of its proper divisors (1).

11580661533631 is an equidigital number, since it uses as much as digits as its factorization.

11580661533631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1166400, while the sum is 49.

The spelling of 11580661533631 in words is "eleven trillion, five hundred eighty billion, six hundred sixty-one million, five hundred thirty-three thousand, six hundred thirty-one".