253378845 has 24 divisors (see below), whose sum is σ = 440542752. Its totient is φ = 134719200.

The previous prime is 253378837. The next prime is 253378859. The reversal of 253378845 is 548873352.

253378845 is a `hidden beast` number, since 2 + 533 + 78 + 8 + 45 = 666.

It is not a de Polignac number, because 253378845 - 2³ = 253378837 is a prime.

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 253378845.

It is a congruent number.

It is an unprimeable number.

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, 6390 + ... + 23400.

It is an arithmetic number, because the mean of its divisors is an integer number (18355948).

Almost surely, 2^253378845 is an apocalyptic number.

It is an amenable number.

253378845 is a deficient number, since it is larger than the sum of its proper divisors (187163907).

253378845 is a wasteful number, since it uses less digits than its factorization.

253378845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17353 (or 17350 counting only the distinct ones).

The product of its digits is 806400, while the sum is 45.

The square root of 253378845 is about 15917.8781563373. The cubic root of 253378845 is about 632.7858862699.

The spelling of 253378845 in words is "two hundred fifty-three million, three hundred seventy-eight thousand, eight hundred forty-five".