117807493681 has 4 divisors (see below), whose sum is σ = 118667402532. Its totient is φ = 116947584832.

The previous prime is 117807493651. The next prime is 117807493709. The reversal of 117807493681 is 186394708711.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 186394708711 = 1069 ⋅174363619.

It can be written as a sum of positive squares in 2 ways, for example, as 51238849600 + 66568644081 = 226360^2 + 258009^2 .

It is a cyclic number.

It is not a de Polignac number, because 117807493681 - 2³¹ = 115660010033 is a prime.

It is a super-3 number, since 3×117807493681³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (117807493621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 429954220 + ... + 429954493.

It is an arithmetic number, because the mean of its divisors is an integer number (29666850633).

Almost surely, 2^117807493681 is an apocalyptic number.

It is an amenable number.

117807493681 is a deficient number, since it is larger than the sum of its proper divisors (859908851).

117807493681 is an equidigital number, since it uses as much as digits as its factorization.

117807493681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 859908850.

The product of its (nonzero) digits is 2032128, while the sum is 55.

The spelling of 117807493681 in words is "one hundred seventeen billion, eight hundred seven million, four hundred ninety-three thousand, six hundred eighty-one".