118865834640 has 1800 divisors, whose sum is σ = 545459287032. Its totient is φ = 23828152320.

The previous prime is 118865834629. The next prime is 118865834663. The reversal of 118865834640 is 46438568811.

118865834640 is a `hidden beast` number, since 1 + 18 + 8 + 6 + 583 + 4 + 6 + 40 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 3301191936 + 115564642704 = 57456^2 + 339948^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 359 ways as a sum of consecutive naturals, for example, 1948620210 + ... + 1948620270.

Almost surely, 2^118865834640 is an apocalyptic number.

118865834640 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 118865834640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (272729643516).

118865834640 is an abundant number, since it is smaller than the sum of its proper divisors (426593452392).

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

118865834640 is a wasteful number, since it uses less digits than its factorization.

118865834640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155 (or 114 counting only the distinct ones).

The product of its (nonzero) digits is 4423680, while the sum is 54.

The spelling of 118865834640 in words is "one hundred eighteen billion, eight hundred sixty-five million, eight hundred thirty-four thousand, six hundred forty".