117651645840 has 40 divisors (see below), whose sum is σ = 364720102848. Its totient is φ = 31373772160.

The previous prime is 117651645763. The next prime is 117651645851. The reversal of 117651645840 is 48546156711.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 117651645840.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 245107356 + ... + 245107835.

Almost surely, 2^117651645840 is an apocalyptic number.

117651645840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

117651645840 is an abundant number, since it is smaller than the sum of its proper divisors (247068457008).

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

117651645840 is a wasteful number, since it uses less digits than its factorization.

117651645840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 490215207 (or 490215201 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 48.

The spelling of 117651645840 in words is "one hundred seventeen billion, six hundred fifty-one million, six hundred forty-five thousand, eight hundred forty".