161345361125 has 64 divisors (see below), whose sum is σ = 220587494400. Its totient is φ = 117103392000.

The previous prime is 161345361061. The next prime is 161345361137. The reversal of 161345361125 is 521163543161.

It is not a de Polignac number, because 161345361125 - 2⁶ = 161345361061 is a prime.

It is a super-2 number, since 2×161345361125² (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, 40263872 + ... + 40267878.

It is an arithmetic number, because the mean of its divisors is an integer number (3446679600).

Almost surely, 2^161345361125 is an apocalyptic number.

It is an amenable number.

161345361125 is a deficient number, since it is larger than the sum of its proper divisors (59242133275).

161345361125 is a wasteful number, since it uses less digits than its factorization.

161345361125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4455 (or 4445 counting only the distinct ones).

The product of its digits is 64800, while the sum is 38.

The spelling of 161345361125 in words is "one hundred sixty-one billion, three hundred forty-five million, three hundred sixty-one thousand, one hundred twenty-five".