252840809268 has 36 divisors (see below), whose sum is σ = 644988924580. Its totient is φ = 83507054976.

The previous prime is 252840809261. The next prime is 252840809269. The reversal of 252840809268 is 862908048252.

It is a happy number.

252840809268 is a `hidden beast` number, since 25 + 284 + 0 + 80 + 9 + 268 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 181670307984 + 71170501284 = 426228^2 + 266778^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252840809261) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32213305 + ... + 32221152.

Almost surely, 2^252840809268 is an apocalyptic number.

It is an amenable number.

252840809268 is an abundant number, since it is smaller than the sum of its proper divisors (392148115312).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

252840809268 is a wasteful number, since it uses less digits than its factorization.

252840809268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64434576 (or 64434571 counting only the distinct ones).

The product of its (nonzero) digits is 4423680, while the sum is 54.

The spelling of 252840809268 in words is "two hundred fifty-two billion, eight hundred forty million, eight hundred nine thousand, two hundred sixty-eight".