11615131583 has 48 divisors (see below), whose sum is σ = 13679124480. Its totient is φ = 9833060160.

The previous prime is 11615131523. The next prime is 11615131589. The reversal of 11615131583 is 38513151611.

It is not a de Polignac number, because 11615131583 - 2⁶ = 11615131519 is a prime.

It is a super-2 number, since 2×11615131583² (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 (11615131589) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 20852741 + ... + 20853297.

It is an arithmetic number, because the mean of its divisors is an integer number (284981760).

Almost surely, 2^11615131583 is an apocalyptic number.

11615131583 is a deficient number, since it is larger than the sum of its proper divisors (2063992897).

11615131583 is a wasteful number, since it uses less digits than its factorization.

11615131583 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 788 (or 777 counting only the distinct ones).

The product of its digits is 10800, while the sum is 35.

The spelling of 11615131583 in words is "eleven billion, six hundred fifteen million, one hundred thirty-one thousand, five hundred eighty-three".