68823742261 has 4 divisors (see below), whose sum is σ = 68849339500. Its totient is φ = 68798145024.

The previous prime is 68823742243. The next prime is 68823742307. The reversal of 68823742261 is 16224732886.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16224732886 = 2 ⋅8112366443.

It can be written as a sum of positive squares in 2 ways, for example, as 14455493361 + 54368248900 = 120231^2 + 233170^2 .

It is a cyclic number.

It is not a de Polignac number, because 68823742261 - 2¹³ = 68823734069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68823742231) 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, 12794586 + ... + 12799963.

It is an arithmetic number, because the mean of its divisors is an integer number (17212334875).

Almost surely, 2^68823742261 is an apocalyptic number.

It is an amenable number.

68823742261 is a deficient number, since it is larger than the sum of its proper divisors (25597239).

68823742261 is a wasteful number, since it uses less digits than its factorization.

68823742261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25597238.

The product of its digits is 1548288, while the sum is 49.

The spelling of 68823742261 in words is "sixty-eight billion, eight hundred twenty-three million, seven hundred forty-two thousand, two hundred sixty-one".