11533437813 has 16 divisors (see below), whose sum is σ = 15439306752. Its totient is φ = 7658310000.

The previous prime is 11533437809. The next prime is 11533437841. The reversal of 11533437813 is 31873433511.

It is a happy number.

It is not a de Polignac number, because 11533437813 - 2² = 11533437809 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11533437803) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1137898 + ... + 1147988.

It is an arithmetic number, because the mean of its divisors is an integer number (964956672).

Almost surely, 2^11533437813 is an apocalyptic number.

It is an amenable number.

11533437813 is a deficient number, since it is larger than the sum of its proper divisors (3905868939).

11533437813 is a wasteful number, since it uses less digits than its factorization.

11533437813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11576.

The product of its digits is 90720, while the sum is 39.

The spelling of 11533437813 in words is "eleven billion, five hundred thirty-three million, four hundred thirty-seven thousand, eight hundred thirteen".