161129559758 has 4 divisors (see below), whose sum is σ = 241694339640. Its totient is φ = 80564779878.

The previous prime is 161129559737. The next prime is 161129559761. The reversal of 161129559758 is 857955921161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 857955921161 = 1201 ⋅714367961.

It is a junction number, because it is equal to n+sod(n) for n = 161129559697 and 161129559706.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40282389938 + ... + 40282389941.

It is an arithmetic number, because the mean of its divisors is an integer number (60423584910).

Almost surely, 2^161129559758 is an apocalyptic number.

161129559758 is a deficient number, since it is larger than the sum of its proper divisors (80564779882).

161129559758 is an equidigital number, since it uses as much as digits as its factorization.

161129559758 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80564779881.

The product of its digits is 6804000, while the sum is 59.

The spelling of 161129559758 in words is "one hundred sixty-one billion, one hundred twenty-nine million, five hundred fifty-nine thousand, seven hundred fifty-eight".