161379737312 has 96 divisors (see below), whose sum is σ = 337022532000. Its totient is φ = 75947010048.

The previous prime is 161379737303. The next prime is 161379737329. The reversal of 161379737312 is 213737973161.

It is a super-2 number, since 2×161379737312² (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 15 ways as a sum of consecutive naturals, for example, 7711439 + ... + 7732337.

It is an arithmetic number, because the mean of its divisors is an integer number (3510651375).

Almost surely, 2^161379737312 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161379737312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (168511266000).

161379737312 is an abundant number, since it is smaller than the sum of its proper divisors (175642794688).

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

161379737312 is a wasteful number, since it uses less digits than its factorization.

161379737312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21148 (or 21140 counting only the distinct ones).

The product of its digits is 1000188, while the sum is 50.

The spelling of 161379737312 in words is "one hundred sixty-one billion, three hundred seventy-nine million, seven hundred thirty-seven thousand, three hundred twelve".