161797075325 has 12 divisors (see below), whose sum is σ = 202403849268. Its totient is φ = 128292192000.

The previous prime is 161797075309. The next prime is 161797075343. The reversal of 161797075325 is 523570797161.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 12965465956 + 148831609369 = 113866^2 + 385787^2 .

It is not a de Polignac number, because 161797075325 - 2⁴ = 161797075309 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28633826 + ... + 28639475.

It is an arithmetic number, because the mean of its divisors is an integer number (16866987439).

Almost surely, 2^161797075325 is an apocalyptic number.

It is an amenable number.

161797075325 is a deficient number, since it is larger than the sum of its proper divisors (40606773943).

161797075325 is a wasteful number, since it uses less digits than its factorization.

161797075325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57273424 (or 57273419 counting only the distinct ones).

The product of its (nonzero) digits is 2778300, while the sum is 53.

The spelling of 161797075325 in words is "one hundred sixty-one billion, seven hundred ninety-seven million, seventy-five thousand, three hundred twenty-five".