117808621840 has 80 divisors (see below), whose sum is σ = 337113923328. Its totient is φ = 37284484608.

The previous prime is 117808621807. The next prime is 117808621841. The reversal of 117808621840 is 48126808711.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (117808621841) 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 15 ways as a sum of consecutive naturals, for example, 8083972 + ... + 8098531.

Almost surely, 2^117808621840 is an apocalyptic number.

117808621840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

117808621840 is an abundant number, since it is smaller than the sum of its proper divisors (219305301488).

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

117808621840 is a wasteful number, since it uses less digits than its factorization.

117808621840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16182536 (or 16182530 counting only the distinct ones).

The product of its (nonzero) digits is 172032, while the sum is 46.

The spelling of 117808621840 in words is "one hundred seventeen billion, eight hundred eight million, six hundred twenty-one thousand, eight hundred forty".