161312565200025 has 24 divisors (see below), whose sum is σ = 268469689104064. Its totient is φ = 85463610696000.

The previous prime is 161312565200023. The next prime is 161312565200063. The reversal of 161312565200025 is 520002565213161.

It is not a de Polignac number, because 161312565200025 - 2¹ = 161312565200023 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161312565200023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7121956234 + ... + 7121978883.

Almost surely, 2^{161312565200025} is an apocalyptic number.

161312565200025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

161312565200025 is a deficient number, since it is larger than the sum of its proper divisors (107157123904039).

161312565200025 is a wasteful number, since it uses less digits than its factorization.

161312565200025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14243935281 (or 14243935276 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 39.

The spelling of 161312565200025 in words is "one hundred sixty-one trillion, three hundred twelve billion, five hundred sixty-five million, two hundred thousand, twenty-five".