268649063437 has 2 divisors, whose sum is σ = 268649063438. Its totient is φ = 268649063436.

The previous prime is 268649063399. The next prime is 268649063471. The reversal of 268649063437 is 734360946862.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 267929429161 + 719634276 = 517619^2 + 26826^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-268649063437 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (268649063497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134324531718 + 134324531719.

It is an arithmetic number, because the mean of its divisors is an integer number (134324531719).

Almost surely, 2^268649063437 is an apocalyptic number.

It is an amenable number.

268649063437 is a deficient number, since it is larger than the sum of its proper divisors (1).

268649063437 is an equidigital number, since it uses as much as digits as its factorization.

268649063437 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31352832, while the sum is 58.

The spelling of 268649063437 in words is "two hundred sixty-eight billion, six hundred forty-nine million, sixty-three thousand, four hundred thirty-seven".