911667138840 has 48 divisors (see below), whose sum is σ = 2962918202400. Its totient is φ = 243111236928.

The previous prime is 911667138821. The next prime is 911667138841. The reversal of 911667138840 is 48831766119.

It is a super-2 number, since 2×911667138840² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (911667138841) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1266204000 + ... + 1266204719.

It is an arithmetic number, because the mean of its divisors is an integer number (61727462550).

Almost surely, 2^911667138840 is an apocalyptic number.

911667138840 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

911667138840 is an abundant number, since it is smaller than the sum of its proper divisors (2051251063560).

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

911667138840 is a wasteful number, since it uses less digits than its factorization.

911667138840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2532408736 (or 2532408729 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 54.

The spelling of 911667138840 in words is "nine hundred eleven billion, six hundred sixty-seven million, one hundred thirty-eight thousand, eight hundred forty".