161425161125 has 16 divisors (see below), whose sum is σ = 201540319344. Its totient is φ = 129087745600.

The previous prime is 161425161103. The next prime is 161425161167. The reversal of 161425161125 is 521161524161.

It can be written as a sum of positive squares in 8 ways, for example, as 48291820516 + 113133340609 = 219754^2 + 336353^2 .

It is not a de Polignac number, because 161425161125 - 2¹² = 161425157029 is a prime.

It is a super-2 number, since 2×161425161125² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48947 + ... + 570303.

It is an arithmetic number, because the mean of its divisors is an integer number (12596269959).

Almost surely, 2^161425161125 is an apocalyptic number.

It is an amenable number.

161425161125 is a deficient number, since it is larger than the sum of its proper divisors (40115158219).

161425161125 is an equidigital number, since it uses as much as digits as its factorization.

161425161125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 523849 (or 523839 counting only the distinct ones).

The product of its digits is 14400, while the sum is 35.

Adding to 161425161125 its reverse (521161524161), we get a palindrome (682586685286).

The spelling of 161425161125 in words is "one hundred sixty-one billion, four hundred twenty-five million, one hundred sixty-one thousand, one hundred twenty-five".