117780505 has 12 divisors (see below), whose sum is σ = 150141420. Its totient is φ = 88680704.

The previous prime is 117780473. The next prime is 117780511. The reversal of 117780505 is 505087711.

It can be written as a sum of positive squares in 6 ways, for example, as 16818201 + 100962304 = 4101^2 + 10048^2 .

It is not a de Polignac number, because 117780505 - 2⁵ = 117780473 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39310 + ... + 42199.

It is an arithmetic number, because the mean of its divisors is an integer number (12511785).

Almost surely, 2^117780505 is an apocalyptic number.

It is an amenable number.

117780505 is a deficient number, since it is larger than the sum of its proper divisors (32360915).

117780505 is an equidigital number, since it uses as much as digits as its factorization.

117780505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81548 (or 81531 counting only the distinct ones).

The product of its (nonzero) digits is 9800, while the sum is 34.

The square root of 117780505 is about 10852.6727122861. The cubic root of 117780505 is about 490.1825017809.

The spelling of 117780505 in words is "one hundred seventeen million, seven hundred eighty thousand, five hundred five".