11533621516431 has 32 divisors (see below), whose sum is σ = 17676755593728. Its totient is φ = 6552601626240.

The previous prime is 11533621516427. The next prime is 11533621516463. The reversal of 11533621516431 is 13461512633511.

It is not a de Polignac number, because 11533621516431 - 2² = 11533621516427 is a prime.

It is a super-2 number, since 2×11533621516431² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11533621516031) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 531156 + ... + 4832118.

It is an arithmetic number, because the mean of its divisors is an integer number (552398612304).

Almost surely, 2^{11533621516431} is an apocalyptic number.

11533621516431 is a deficient number, since it is larger than the sum of its proper divisors (6143134077297).

11533621516431 is a wasteful number, since it uses less digits than its factorization.

11533621516431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4301711.

The product of its digits is 194400, while the sum is 42.

The spelling of 11533621516431 in words is "eleven trillion, five hundred thirty-three billion, six hundred twenty-one million, five hundred sixteen thousand, four hundred thirty-one".