117990261988 has 24 divisors (see below), whose sum is σ = 211586931360. Its totient is φ = 57537775680.

The previous prime is 117990261979. The next prime is 117990261989. The reversal of 117990261988 is 889162099711.

It is not an unprimeable number, because it can be changed into a prime (117990261989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 405003 + ... + 632461.

It is an arithmetic number, because the mean of its divisors is an integer number (8816122140).

Almost surely, 2^117990261988 is an apocalyptic number.

It is an amenable number.

117990261988 is a deficient number, since it is larger than the sum of its proper divisors (93596669372).

117990261988 is a wasteful number, since it uses less digits than its factorization.

117990261988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230667 (or 230665 counting only the distinct ones).

The product of its (nonzero) digits is 3919104, while the sum is 61.

The spelling of 117990261988 in words is "one hundred seventeen billion, nine hundred ninety million, two hundred sixty-one thousand, nine hundred eighty-eight".