253904843391 has 16 divisors (see below), whose sum is σ = 374038850304. Its totient is φ = 152386196864.

The previous prime is 253904843377. The next prime is 253904843393. The reversal of 253904843391 is 193348409352.

It is a cyclic number.

It is not a de Polignac number, because 253904843391 - 2¹³ = 253904835199 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253904843393) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 108227661 + ... + 108230006.

It is an arithmetic number, because the mean of its divisors is an integer number (23377428144).

Almost surely, 2^253904843391 is an apocalyptic number.

253904843391 is a deficient number, since it is larger than the sum of its proper divisors (120134006913).

253904843391 is a wasteful number, since it uses less digits than its factorization.

253904843391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216457710.

The product of its (nonzero) digits is 2799360, while the sum is 51.

The spelling of 253904843391 in words is "two hundred fifty-three billion, nine hundred four million, eight hundred forty-three thousand, three hundred ninety-one".