117154611997 has 8 divisors (see below), whose sum is σ = 117847252440. Its totient is φ = 116462149440.

The previous prime is 117154611989. The next prime is 117154612063. The reversal of 117154611997 is 799116451711.

It can be written as a sum of positive squares in 4 ways, for example, as 44596570041 + 72558041956 = 211179^2 + 269366^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 117154611997 - 2³ = 117154611989 is a prime.

It is a super-2 number, since 2×117154611997² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117154611397) 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, 1418047 + ... + 1498387.

It is an arithmetic number, because the mean of its divisors is an integer number (14730906555).

Almost surely, 2^117154611997 is an apocalyptic number.

It is an amenable number.

117154611997 is a deficient number, since it is larger than the sum of its proper divisors (692640443).

117154611997 is an equidigital number, since it uses as much as digits as its factorization.

117154611997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88943.

The product of its digits is 476280, while the sum is 52.

The spelling of 117154611997 in words is "one hundred seventeen billion, one hundred fifty-four million, six hundred eleven thousand, nine hundred ninety-seven".