11840696581 has 12 divisors (see below), whose sum is σ = 13775714400. Its totient is φ = 10147810680.

The previous prime is 11840696563. The next prime is 11840696611. The reversal of 11840696581 is 18569604811.

It is not a de Polignac number, because 11840696581 - 2³¹ = 9693212933 is a prime.

It is a super-2 number, since 2×11840696581² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11840696521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 564520 + ... + 585118.

It is an arithmetic number, because the mean of its divisors is an integer number (1147976200).

Almost surely, 2^11840696581 is an apocalyptic number.

It is an amenable number.

11840696581 is a deficient number, since it is larger than the sum of its proper divisors (1935017819).

11840696581 is a wasteful number, since it uses less digits than its factorization.

11840696581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32344 (or 32337 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 49.

The spelling of 11840696581 in words is "eleven billion, eight hundred forty million, six hundred ninety-six thousand, five hundred eighty-one".