11871426431640 has 64 divisors (see below), whose sum is σ = 35669840024160. Its totient is φ = 3160774983680.

The previous prime is 11871426431639. The next prime is 11871426431659. The reversal of 11871426431640 is 4613462417811.

It is a self number, because there is not a number n which added to its sum of digits gives 11871426431640.

It is a congruent number.

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, 77090439 + ... + 77244278.

Almost surely, 2^{11871426431640} is an apocalyptic number.

11871426431640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11871426431640 is an abundant number, since it is smaller than the sum of its proper divisors (23798413592520).

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

11871426431640 is a wasteful number, since it uses less digits than its factorization.

11871426431640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154335372 (or 154335368 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 48.

The spelling of 11871426431640 in words is "eleven trillion, eight hundred seventy-one billion, four hundred twenty-six million, four hundred thirty-one thousand, six hundred forty".