325661643 has 6 divisors (see below), whose sum is σ = 470400164. Its totient is φ = 217107756.

The previous prime is 325661641. The next prime is 325661657. The reversal of 325661643 is 346166523.

325661643 is a `hidden beast` number, since 3 + 2 + 5 + 6 + 6 + 1 + 643 = 666.

It is not a de Polignac number, because 325661643 - 2¹ = 325661641 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 325661598 and 325661607.

It is not an unprimeable number, because it can be changed into a prime (325661641) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18092305 + ... + 18092322.

Almost surely, 2^325661643 is an apocalyptic number.

325661643 is a deficient number, since it is larger than the sum of its proper divisors (144738521).

325661643 is a wasteful number, since it uses less digits than its factorization.

325661643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36184633 (or 36184630 counting only the distinct ones).

The product of its digits is 77760, while the sum is 36.

The square root of 325661643 is about 18046.0977222224. The cubic root of 325661643 is about 688.0006837867. Note that the first 3 decimals are identical.

The spelling of 325661643 in words is "three hundred twenty-five million, six hundred sixty-one thousand, six hundred forty-three".