117853397478 has 12 divisors (see below), whose sum is σ = 255349027908. Its totient is φ = 39284465820.

The previous prime is 117853397437. The next prime is 117853397507. The reversal of 117853397478 is 874793358711.

117853397478 is a `hidden beast` number, since 1 + 1 + 7 + 8 + 533 + 97 + 4 + 7 + 8 = 666.

117853397478 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3273705468 + ... + 3273705503.

It is an arithmetic number, because the mean of its divisors is an integer number (21279085659).

Almost surely, 2^117853397478 is an apocalyptic number.

117853397478 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

117853397478 is an abundant number, since it is smaller than the sum of its proper divisors (137495630430).

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

117853397478 is a wasteful number, since it uses less digits than its factorization.

117853397478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6547410979 (or 6547410976 counting only the distinct ones).

The product of its digits is 35562240, while the sum is 63.

The spelling of 117853397478 in words is "one hundred seventeen billion, eight hundred fifty-three million, three hundred ninety-seven thousand, four hundred seventy-eight".