117565770 has 64 divisors (see below), whose sum is σ = 326926080. Its totient is φ = 26500608.

The previous prime is 117565759. The next prime is 117565793. The reversal of 117565770 is 77565711.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11496 + ... + 19164.

It is an arithmetic number, because the mean of its divisors is an integer number (5108220).

Almost surely, 2^117565770 is an apocalyptic number.

117565770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 117565770, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (163463040).

117565770 is an abundant number, since it is smaller than the sum of its proper divisors (209360310).

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

117565770 is a wasteful number, since it uses less digits than its factorization.

117565770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7759.

The product of its (nonzero) digits is 51450, while the sum is 39.

The square root of 117565770 is about 10842.7750138053. The cubic root of 117565770 is about 489.8844236644.

The spelling of 117565770 in words is "one hundred seventeen million, five hundred sixty-five thousand, seven hundred seventy".