117660645421 has 32 divisors (see below), whose sum is σ = 133790146560. Its totient is φ = 102508718400.

The previous prime is 117660645413. The next prime is 117660645439. The reversal of 117660645421 is 124546066711.

It is not a de Polignac number, because 117660645421 - 2³ = 117660645413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117660645121) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15770590 + ... + 15778048.

It is an arithmetic number, because the mean of its divisors is an integer number (4180942080).

Almost surely, 2^117660645421 is an apocalyptic number.

117660645421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

117660645421 is a deficient number, since it is larger than the sum of its proper divisors (16129501139).

117660645421 is a wasteful number, since it uses less digits than its factorization.

117660645421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7945.

The product of its (nonzero) digits is 241920, while the sum is 43.

The spelling of 117660645421 in words is "one hundred seventeen billion, six hundred sixty million, six hundred forty-five thousand, four hundred twenty-one".