268651664 has 10 divisors (see below), whose sum is σ = 520512630. Its totient is φ = 134325824.

The previous prime is 268651651. The next prime is 268651681. The reversal of 268651664 is 466156862.

It can be written as a sum of positive squares in only one way, i.e., 207936400 + 60715264 = 14420^2 + 7792^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8395349 + ... + 8395380.

It is an arithmetic number, because the mean of its divisors is an integer number (52051263).

Almost surely, 2^268651664 is an apocalyptic number.

It is an amenable number.

268651664 is a deficient number, since it is larger than the sum of its proper divisors (251860966).

268651664 is a wasteful number, since it uses less digits than its factorization.

268651664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16790737 (or 16790731 counting only the distinct ones).

The product of its digits is 414720, while the sum is 44.

The square root of 268651664 is about 16390.5968164677. The cubic root of 268651664 is about 645.2527215103.

The spelling of 268651664 in words is "two hundred sixty-eight million, six hundred fifty-one thousand, six hundred sixty-four".