117658557540 has 576 divisors, whose sum is σ = 415461795840. Its totient is φ = 26754416640.

The previous prime is 117658557539. The next prime is 117658557581. The reversal of 117658557540 is 45755856711.

117658557540 is a `hidden beast` number, since 1 + 1 + 7 + 6 + 585 + 5 + 7 + 54 + 0 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 174826644 + ... + 174827316.

It is an arithmetic number, because the mean of its divisors is an integer number (721287840).

Almost surely, 2^117658557540 is an apocalyptic number.

117658557540 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 117658557540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (207730897920).

117658557540 is an abundant number, since it is smaller than the sum of its proper divisors (297803238300).

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

117658557540 is a wasteful number, since it uses less digits than its factorization.

117658557540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 852 (or 847 counting only the distinct ones).

The product of its (nonzero) digits is 5880000, while the sum is 54.

The spelling of 117658557540 in words is "one hundred seventeen billion, six hundred fifty-eight million, five hundred fifty-seven thousand, five hundred forty".