161641575014701 has 4 divisors (see below), whose sum is σ = 161672943460572. Its totient is φ = 161610206568832.

The previous prime is 161641575014669. The next prime is 161641575014761. The reversal of 161641575014701 is 107410575146161.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 44093716896100 + 117547858118601 = 6640310^2 + 10841949^2 .

It is a cyclic number.

It is not a de Polignac number, because 161641575014701 - 2⁵ = 161641575014669 is a prime.

It is a super-2 number, since 2×161641575014701² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161641575014761) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15684215206 + ... + 15684225511.

It is an arithmetic number, because the mean of its divisors is an integer number (40418235865143).

Almost surely, 2^{161641575014701} is an apocalyptic number.

It is an amenable number.

161641575014701 is a deficient number, since it is larger than the sum of its proper divisors (31368445871).

161641575014701 is an equidigital number, since it uses as much as digits as its factorization.

161641575014701 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31368445870.

The product of its (nonzero) digits is 705600, while the sum is 49.

The spelling of 161641575014701 in words is "one hundred sixty-one trillion, six hundred forty-one billion, five hundred seventy-five million, fourteen thousand, seven hundred one".