268697219939 has 4 divisors (see below), whose sum is σ = 269406183960. Its totient is φ = 267988255920.

The previous prime is 268697219927. The next prime is 268697220019. The reversal of 268697219939 is 939912796862.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-268697219939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (268697219909) 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, 354481442 + ... + 354482199.

It is an arithmetic number, because the mean of its divisors is an integer number (67351545990).

Almost surely, 2^268697219939 is an apocalyptic number.

268697219939 is a deficient number, since it is larger than the sum of its proper divisors (708964021).

268697219939 is an equidigital number, since it uses as much as digits as its factorization.

268697219939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 708964020.

The product of its digits is 158723712, while the sum is 71.

The spelling of 268697219939 in words is "two hundred sixty-eight billion, six hundred ninety-seven million, two hundred nineteen thousand, nine hundred thirty-nine".