117864823551 has 16 divisors (see below), whose sum is σ = 159682811520. Its totient is φ = 77321239200.

The previous prime is 117864823477. The next prime is 117864823553. The reversal of 117864823551 is 155328468711.

It is a de Polignac number, because none of the positive numbers 2^k-117864823551 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 117864823494 and 117864823503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117864823553) 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, 1143841 + ... + 1242618.

It is an arithmetic number, because the mean of its divisors is an integer number (9980175720).

Almost surely, 2^117864823551 is an apocalyptic number.

117864823551 is a deficient number, since it is larger than the sum of its proper divisors (41817987969).

117864823551 is a wasteful number, since it uses less digits than its factorization.

117864823551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2386726.

The product of its digits is 1612800, while the sum is 51.

The spelling of 117864823551 in words is "one hundred seventeen billion, eight hundred sixty-four million, eight hundred twenty-three thousand, five hundred fifty-one".