117638999440 has 40 divisors (see below), whose sum is σ = 273539208888. Its totient is φ = 47050690560.

The previous prime is 117638999419. The next prime is 117638999441. The reversal of 117638999440 is 44999836711.

It can be written as a sum of positive squares in 4 ways, for example, as 14449001616 + 103189997824 = 120204^2 + 321232^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (117638999441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 750270 + ... + 893410.

Almost surely, 2^117638999440 is an apocalyptic number.

117638999440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

117638999440 is an abundant number, since it is smaller than the sum of its proper divisors (155900209448).

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

117638999440 is a wasteful number, since it uses less digits than its factorization.

117638999440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153427 (or 153421 counting only the distinct ones).

The product of its (nonzero) digits is 11757312, while the sum is 61.

The spelling of 117638999440 in words is "one hundred seventeen billion, six hundred thirty-eight million, nine hundred ninety-nine thousand, four hundred forty".