253523668 has 6 divisors (see below), whose sum is σ = 443666426. Its totient is φ = 126761832.

The previous prime is 253523653. The next prime is 253523681. The reversal of 253523668 is 866325352.

It can be written as a sum of positive squares in only one way, i.e., 245298244 + 8225424 = 15662^2 + 2868^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 253523668.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31690455 + ... + 31690462.

Almost surely, 2^253523668 is an apocalyptic number.

It is an amenable number.

253523668 is a deficient number, since it is larger than the sum of its proper divisors (190142758).

253523668 is a wasteful number, since it uses less digits than its factorization.

253523668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63380921 (or 63380919 counting only the distinct ones).

The product of its digits is 259200, while the sum is 40.

The square root of 253523668 is about 15922.4265738612. The cubic root of 253523668 is about 632.9064231628.

The spelling of 253523668 in words is "two hundred fifty-three million, five hundred twenty-three thousand, six hundred sixty-eight".