117981902745 has 48 divisors (see below), whose sum is σ = 233741963520. Its totient is φ = 53928715392.

The previous prime is 117981902743. The next prime is 117981902879. The reversal of 117981902745 is 547209189711.

It is not a de Polignac number, because 117981902745 - 2¹ = 117981902743 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 117981902691 and 117981902700.

It is not an unprimeable number, because it can be changed into a prime (117981902741) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4395676 + ... + 4422434.

It is an arithmetic number, because the mean of its divisors is an integer number (4869624240).

Almost surely, 2^117981902745 is an apocalyptic number.

117981902745 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

117981902745 is a deficient number, since it is larger than the sum of its proper divisors (115760060775).

117981902745 is a wasteful number, since it uses less digits than its factorization.

117981902745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40774 (or 40771 counting only the distinct ones).

The product of its (nonzero) digits is 1270080, while the sum is 54.

The spelling of 117981902745 in words is "one hundred seventeen billion, nine hundred eighty-one million, nine hundred two thousand, seven hundred forty-five".