161053625 has 8 divisors (see below), whose sum is σ = 200995080. Its totient is φ = 128842800.

The previous prime is 161053621. The next prime is 161053661. The reversal of 161053625 is 526350161.

It can be written as a sum of positive squares in 4 ways, for example, as 10156969 + 150896656 = 3187^2 + 12284^2 .

It is not a de Polignac number, because 161053625 - 2² = 161053621 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (161053621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 644090 + ... + 644339.

It is an arithmetic number, because the mean of its divisors is an integer number (25124385).

Almost surely, 2^161053625 is an apocalyptic number.

It is an amenable number.

161053625 is a deficient number, since it is larger than the sum of its proper divisors (39941455).

161053625 is an equidigital number, since it uses as much as digits as its factorization.

161053625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1288444 (or 1288434 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 161053625 is about 12690.6904855488. The cubic root of 161053625 is about 544.0725747050.

The spelling of 161053625 in words is "one hundred sixty-one million, fifty-three thousand, six hundred twenty-five".