118564231680 has 320 divisors, whose sum is σ = 443320732800. Its totient is φ = 29952737280.

The previous prime is 118564231657. The next prime is 118564231697. The reversal of 118564231680 is 86132465811.

118564231680 is a `hidden beast` number, since 1 + 1 + 8 + 564 + 2 + 3 + 1 + 6 + 80 = 666.

It is a tau number, because it is divible by the number of its divisors (320).

It is a Harshad number since it is a multiple of its sum of digits (45).

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, 1268140 + ... + 1358420.

It is an arithmetic number, because the mean of its divisors is an integer number (1385377290).

Almost surely, 2^118564231680 is an apocalyptic number.

118564231680 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 118564231680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (221660366400).

118564231680 is an abundant number, since it is smaller than the sum of its proper divisors (324756501120).

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

118564231680 is an equidigital number, since it uses as much as digits as its factorization.

118564231680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90332 (or 90310 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 45.

The spelling of 118564231680 in words is "one hundred eighteen billion, five hundred sixty-four million, two hundred thirty-one thousand, six hundred eighty".