268716157 has 4 divisors (see below), whose sum is σ = 269889820. Its totient is φ = 267542496.

The previous prime is 268716137. The next prime is 268716191. The reversal of 268716157 is 751617862.

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 115476516 + 153239641 = 10746^2 + 12379^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-268716157 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 (268716137) 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, 586488 + ... + 586945.

It is an arithmetic number, because the mean of its divisors is an integer number (67472455).

Almost surely, 2^268716157 is an apocalyptic number.

It is an amenable number.

268716157 is a deficient number, since it is larger than the sum of its proper divisors (1173663).

268716157 is a wasteful number, since it uses less digits than its factorization.

268716157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1173662.

The product of its digits is 141120, while the sum is 43.

The square root of 268716157 is about 16392.5640764342. The cubic root of 268716157 is about 645.3043508874.

The spelling of 268716157 in words is "two hundred sixty-eight million, seven hundred sixteen thousand, one hundred fifty-seven".