161129598740 has 192 divisors, whose sum is σ = 393435705600. Its totient is φ = 54867456000.

The previous prime is 161129598739. The next prime is 161129598787. The reversal of 161129598740 is 47895921161.

161129598740 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×161129598740² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 89465840 + ... + 89467640.

It is an arithmetic number, because the mean of its divisors is an integer number (2049144300).

Almost surely, 2^161129598740 is an apocalyptic number.

161129598740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161129598740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (196717852800).

161129598740 is an abundant number, since it is smaller than the sum of its proper divisors (232306106860).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161129598740 is a wasteful number, since it uses less digits than its factorization.

161129598740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2266 (or 2264 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 53.

The spelling of 161129598740 in words is "one hundred sixty-one billion, one hundred twenty-nine million, five hundred ninety-eight thousand, seven hundred forty".