68818932253 has 4 divisors (see below), whose sum is σ = 68820533820. Its totient is φ = 68817330688.

The previous prime is 68818932251. The next prime is 68818932257. The reversal of 68818932253 is 35223981886.

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 4435959609 + 64382972644 = 66603^2 + 253738^2 .

It is a cyclic number.

It is not a de Polignac number, because 68818932253 - 2¹ = 68818932251 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 68818932194 and 68818932203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68818932251) 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, 734500 + ... + 822877.

It is an arithmetic number, because the mean of its divisors is an integer number (17205133455).

Almost surely, 2^68818932253 is an apocalyptic number.

It is an amenable number.

68818932253 is a deficient number, since it is larger than the sum of its proper divisors (1601567).

68818932253 is a wasteful number, since it uses less digits than its factorization.

68818932253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1601566.

The product of its digits is 4976640, while the sum is 55.

The spelling of 68818932253 in words is "sixty-eight billion, eight hundred eighteen million, nine hundred thirty-two thousand, two hundred fifty-three".