117817011542 has 4 divisors (see below), whose sum is σ = 176725517316. Its totient is φ = 58908505770.

The previous prime is 117817011511. The next prime is 117817011547. The reversal of 117817011542 is 245110718711.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 245110718711 = 300323 ⋅816157.

It is a super-2 number, since 2×117817011542² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 117817011496 and 117817011505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117817011547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 29454252884 + ... + 29454252887.

It is an arithmetic number, because the mean of its divisors is an integer number (44181379329).

Almost surely, 2^117817011542 is an apocalyptic number.

117817011542 is a deficient number, since it is larger than the sum of its proper divisors (58908505774).

117817011542 is an equidigital number, since it uses as much as digits as its factorization.

117817011542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58908505773.

The product of its (nonzero) digits is 15680, while the sum is 38.

The spelling of 117817011542 in words is "one hundred seventeen billion, eight hundred seventeen million, eleven thousand, five hundred forty-two".