161459857525 has 6 divisors (see below), whose sum is σ = 200210223362. Its totient is φ = 129167886000.

The previous prime is 161459857511. The next prime is 161459857529. The reversal of 161459857525 is 525758954161.

It can be written as a sum of positive squares in 3 ways, for example, as 29050475364 + 132409382161 = 170442^2 + 363881^2 .

It is a de Polignac number, because none of the positive numbers 2^k-161459857525 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 161459857525.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161459857529) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3229197126 + ... + 3229197175.

Almost surely, 2^161459857525 is an apocalyptic number.

It is an amenable number.

161459857525 is a deficient number, since it is larger than the sum of its proper divisors (38750365837).

161459857525 is an equidigital number, since it uses as much as digits as its factorization.

161459857525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6458394311 (or 6458394306 counting only the distinct ones).

The product of its digits is 15120000, while the sum is 58.

The spelling of 161459857525 in words is "one hundred sixty-one billion, four hundred fifty-nine million, eight hundred fifty-seven thousand, five hundred twenty-five".