68307891253 has 16 divisors (see below), whose sum is σ = 82229017600. Its totient is φ = 56660914800.

The previous prime is 68307891221. The next prime is 68307891299. The reversal of 68307891253 is 35219870386.

It is not a de Polignac number, because 68307891253 - 2⁵ = 68307891221 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 68307891253.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68307091253) 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, 3201438 + ... + 3222703.

It is an arithmetic number, because the mean of its divisors is an integer number (5139313600).

Almost surely, 2^68307891253 is an apocalyptic number.

It is an amenable number.

68307891253 is a deficient number, since it is larger than the sum of its proper divisors (13921126347).

68307891253 is an equidigital number, since it uses as much as digits as its factorization.

68307891253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6424193 (or 6424179 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 52.

The spelling of 68307891253 in words is "sixty-eight billion, three hundred seven million, eight hundred ninety-one thousand, two hundred fifty-three".