11131974840 has 96 divisors (see below), whose sum is σ = 38848340880. Its totient is φ = 2544450048.

The previous prime is 11131974827. The next prime is 11131974877. The reversal of 11131974840 is 4847913111.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 940717 + ... + 952476.

Almost surely, 2^11131974840 is an apocalyptic number.

11131974840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11131974840 is an abundant number, since it is smaller than the sum of its proper divisors (27716366040).

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

11131974840 is a wasteful number, since it uses less digits than its factorization.

11131974840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1893221 (or 1893210 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 39.

The spelling of 11131974840 in words is "eleven billion, one hundred thirty-one million, nine hundred seventy-four thousand, eight hundred forty".