161350025 has 12 divisors (see below), whose sum is σ = 202058124. Its totient is φ = 127800000.

The previous prime is 161350019. The next prime is 161350027. The reversal of 161350025 is 520053161.

It can be written as a sum of positive squares in 6 ways, for example, as 27415696 + 133934329 = 5236^2 + 11573^2 .

It is not a de Polignac number, because 161350025 - 2¹⁶ = 161284489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161350027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29426 + ... + 34475.

It is an arithmetic number, because the mean of its divisors is an integer number (16838177).

Almost surely, 2^161350025 is an apocalyptic number.

It is an amenable number.

161350025 is a deficient number, since it is larger than the sum of its proper divisors (40708099).

161350025 is a wasteful number, since it uses less digits than its factorization.

161350025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64012 (or 64007 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 161350025 is about 12702.3629691487. The cubic root of 161350025 is about 544.4061370690.

The spelling of 161350025 in words is "one hundred sixty-one million, three hundred fifty thousand, twenty-five".