11311002540 has 48 divisors (see below), whose sum is σ = 35189787360. Its totient is φ = 3016267200.

The previous prime is 11311002539. The next prime is 11311002557. The reversal of 11311002540 is 4520011311.

11311002540 is a `hidden beast` number, since 1 + 13 + 110 + 0 + 2 + 540 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

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, 10472611 + ... + 10473690.

It is an arithmetic number, because the mean of its divisors is an integer number (733120570).

Almost surely, 2^11311002540 is an apocalyptic number.

11311002540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11311002540 is an abundant number, since it is smaller than the sum of its proper divisors (23878784820).

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

11311002540 is a wasteful number, since it uses less digits than its factorization.

11311002540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20946319 (or 20946311 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

Adding to 11311002540 its reverse (4520011311), we get a palindrome (15831013851).

The spelling of 11311002540 in words is "eleven billion, three hundred eleven million, two thousand, five hundred forty".