11537442623 has 4 divisors (see below), whose sum is σ = 13185648720. Its totient is φ = 9889236528.

The previous prime is 11537442559. The next prime is 11537442629. The reversal of 11537442623 is 32624473511.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11537442623 - 2⁶ = 11537442559 is a prime.

It is a super-2 number, since 2×11537442623² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11537442629) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 824103038 + ... + 824103051.

It is an arithmetic number, because the mean of its divisors is an integer number (3296412180).

Almost surely, 2^11537442623 is an apocalyptic number.

11537442623 is a deficient number, since it is larger than the sum of its proper divisors (1648206097).

11537442623 is an equidigital number, since it uses as much as digits as its factorization.

11537442623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1648206096.

The product of its digits is 120960, while the sum is 38.

The spelling of 11537442623 in words is "eleven billion, five hundred thirty-seven million, four hundred forty-two thousand, six hundred twenty-three".