161129598738 has 16 divisors (see below), whose sum is σ = 322269415776. Its totient is φ = 53708163200.

The previous prime is 161129598737. The next prime is 161129598739. The reversal of 161129598738 is 837895921161.

It is an interprime number because it is at equal distance from previous prime (161129598737) and next prime (161129598739).

It is not an unprimeable number, because it can be changed into a prime (161129598731) 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, 212556 + ... + 606167.

It is an arithmetic number, because the mean of its divisors is an integer number (20141838486).

Almost surely, 2^161129598738 is an apocalyptic number.

161129598738 is an abundant number, since it is smaller than the sum of its proper divisors (161139817038).

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

161129598738 is a wasteful number, since it uses less digits than its factorization.

161129598738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 851529.

The product of its digits is 6531840, while the sum is 60.

The spelling of 161129598738 in words is "one hundred sixty-one billion, one hundred twenty-nine million, five hundred ninety-eight thousand, seven hundred thirty-eight".