161748999291364 has 27 divisors (see below), whose sum is σ = 286013347670043. Its totient is φ = 80039520983808.

The previous prime is 161748999291361. The next prime is 161748999291367. The reversal of 161748999291364 is 463192999847161.

The square root of 161748999291364 is 12718058.

It is a perfect power (a square), and thus also a powerful number.

It is an interprime number because it is at equal distance from previous prime (161748999291361) and next prime (161748999291367).

It can be written as a sum of positive squares in 4 ways, for example, as 4759125497764 + 156989873793600 = 2181542^2 + 12529560^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161748999291361) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2467270474 + ... + 2467336030.

Almost surely, 2^{161748999291364} is an apocalyptic number.

161748999291364 is the 12718058-th square number.

It is an amenable number.

161748999291364 is a deficient number, since it is larger than the sum of its proper divisors (124264348378679).

161748999291364 is an frugal number, since it uses more digits than its factorization.

161748999291364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131312 (or 65656 counting only the distinct ones).

The product of its digits is 1269789696, while the sum is 79.

The spelling of 161748999291364 in words is "one hundred sixty-one trillion, seven hundred forty-eight billion, nine hundred ninety-nine million, two hundred ninety-one thousand, three hundred sixty-four".