11581245690 has 32 divisors (see below), whose sum is σ = 31765703040. Its totient is φ = 2647141824.

The previous prime is 11581245679. The next prime is 11581245743. The reversal of 11581245690 is 9654218511.

It is a super-2 number, since 2×11581245690² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27574185 + ... + 27574604.

It is an arithmetic number, because the mean of its divisors is an integer number (992678220).

Almost surely, 2^11581245690 is an apocalyptic number.

11581245690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11581245690 is an abundant number, since it is smaller than the sum of its proper divisors (20184457350).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11581245690 is a wasteful number, since it uses less digits than its factorization.

11581245690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55148806.

The product of its (nonzero) digits is 86400, while the sum is 42.

The spelling of 11581245690 in words is "eleven billion, five hundred eighty-one million, two hundred forty-five thousand, six hundred ninety".