253645695 has 64 divisors (see below), whose sum is σ = 483840000. Its totient is φ = 125618688.

The previous prime is 253645663. The next prime is 253645697. The reversal of 253645695 is 596546352.

253645695 is a `hidden beast` number, since 25 + 3 + 64 + 569 + 5 = 666.

It is not a de Polignac number, because 253645695 - 2⁵ = 253645663 is a prime.

It is a super-2 number, since 2×253645695² = 128672277184066050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 253645695.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253645697) 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 63 ways as a sum of consecutive naturals, for example, 180606 + ... + 182004.

It is an arithmetic number, because the mean of its divisors is an integer number (7560000).

Almost surely, 2^253645695 is an apocalyptic number.

253645695 is a deficient number, since it is larger than the sum of its proper divisors (230194305).

253645695 is a wasteful number, since it uses less digits than its factorization.

253645695 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1509 (or 1503 counting only the distinct ones).

The product of its digits is 972000, while the sum is 45.

The square root of 253645695 is about 15926.2580350816. The cubic root of 253645695 is about 633.0079512040.

The spelling of 253645695 in words is "two hundred fifty-three million, six hundred forty-five thousand, six hundred ninety-five".