117551640 has 64 divisors (see below), whose sum is σ = 355816800. Its totient is φ = 31066112.

The previous prime is 117551563. The next prime is 117551641. The reversal of 117551640 is 46155711.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 117551598 and 117551607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117551641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9226 + ... + 17894.

Almost surely, 2^117551640 is an apocalyptic number.

117551640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 117551640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (177908400).

117551640 is an abundant number, since it is smaller than the sum of its proper divisors (238265160).

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

117551640 is a wasteful number, since it uses less digits than its factorization.

117551640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8796 (or 8792 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 30.

The square root of 117551640 is about 10842.1234082628. The cubic root of 117551640 is about 489.8647967944.

The spelling of 117551640 in words is "one hundred seventeen million, five hundred fifty-one thousand, six hundred forty".