161500670245 has 8 divisors (see below), whose sum is σ = 193815064440. Its totient is φ = 129191029440.

The previous prime is 161500670239. The next prime is 161500670251. The reversal of 161500670245 is 542076005161.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (161500670239) and next prime (161500670251).

It can be written as a sum of positive squares in 4 ways, for example, as 29249892676 + 132250777569 = 171026^2 + 363663^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 161500670245 - 2¹⁵ = 161500637477 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1113166 + ... + 1249855.

It is an arithmetic number, because the mean of its divisors is an integer number (24226883055).

Almost surely, 2^161500670245 is an apocalyptic number.

It is an amenable number.

161500670245 is a deficient number, since it is larger than the sum of its proper divisors (32314394195).

161500670245 is a wasteful number, since it uses less digits than its factorization.

161500670245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2376695.

The product of its (nonzero) digits is 50400, while the sum is 37.

The spelling of 161500670245 in words is "one hundred sixty-one billion, five hundred million, six hundred seventy thousand, two hundred forty-five".