163251865625 has 24 divisors (see below), whose sum is σ = 206344839960. Its totient is φ = 129133840000.

The previous prime is 163251865613. The next prime is 163251865627. The reversal of 163251865625 is 526568152361.

It can be written as a sum of positive squares in 12 ways, for example, as 161280150409 + 1971715216 = 401597^2 + 44404^2 .

It is not a de Polignac number, because 163251865625 - 2¹⁸ = 163251603481 is a prime.

It is not an unprimeable number, because it can be changed into a prime (163251865627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15362 + ... + 571611.

It is an arithmetic number, because the mean of its divisors is an integer number (8597701665).

Almost surely, 2^163251865625 is an apocalyptic number.

It is an amenable number.

163251865625 is a deficient number, since it is larger than the sum of its proper divisors (43092974335).

163251865625 is an frugal number, since it uses more digits than its factorization.

163251865625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 587087 (or 587067 counting only the distinct ones).

The product of its digits is 2592000, while the sum is 50.

The spelling of 163251865625 in words is "one hundred sixty-three billion, two hundred fifty-one million, eight hundred sixty-five thousand, six hundred twenty-five".