253810856293 has 4 divisors (see below), whose sum is σ = 258599740428. Its totient is φ = 249021972160.

The previous prime is 253810856291. The next prime is 253810856309. The reversal of 253810856293 is 392658018352.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 186263885889 + 67546970404 = 431583^2 + 259898^2 .

It is a cyclic number.

It is not a de Polignac number, because 253810856293 - 2¹ = 253810856291 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 253810856293.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253810856291) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2394441988 + ... + 2394442093.

It is an arithmetic number, because the mean of its divisors is an integer number (64649935107).

Almost surely, 2^253810856293 is an apocalyptic number.

It is an amenable number.

253810856293 is a deficient number, since it is larger than the sum of its proper divisors (4788884135).

253810856293 is an equidigital number, since it uses as much as digits as its factorization.

253810856293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4788884134.

The product of its (nonzero) digits is 3110400, while the sum is 52.

The spelling of 253810856293 in words is "two hundred fifty-three billion, eight hundred ten million, eight hundred fifty-six thousand, two hundred ninety-three".