117851335561 has 8 divisors (see below), whose sum is σ = 119826685664. Its totient is φ = 115885740960.

The previous prime is 117851335541. The next prime is 117851335583. The reversal of 117851335561 is 165533158711.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-117851335561 is a prime.

It is a super-2 number, since 2×117851335561² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (117851335541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2414511 + ... + 2462836.

It is an arithmetic number, because the mean of its divisors is an integer number (14978335708).

Almost surely, 2^117851335561 is an apocalyptic number.

It is an amenable number.

117851335561 is a deficient number, since it is larger than the sum of its proper divisors (1975350103).

117851335561 is an equidigital number, since it uses as much as digits as its factorization.

117851335561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4877751.

The product of its digits is 378000, while the sum is 46.

The spelling of 117851335561 in words is "one hundred seventeen billion, eight hundred fifty-one million, three hundred thirty-five thousand, five hundred sixty-one".