253510665642 has 48 divisors (see below), whose sum is σ = 617243372928. Its totient is φ = 74611833120.

The previous prime is 253510665557. The next prime is 253510665659. The reversal of 253510665642 is 246566015352.

253510665642 is a `hidden beast` number, since 2 + 535 + 1 + 0 + 66 + 56 + 4 + 2 = 666.

253510665642 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23546334 + ... + 23557097.

It is an arithmetic number, because the mean of its divisors is an integer number (12859236936).

Almost surely, 2^253510665642 is an apocalyptic number.

253510665642 is an abundant number, since it is smaller than the sum of its proper divisors (363732707286).

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

253510665642 is a wasteful number, since it uses less digits than its factorization.

253510665642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47103475 (or 47103472 counting only the distinct ones).

The product of its (nonzero) digits is 1296000, while the sum is 45.

The spelling of 253510665642 in words is "two hundred fifty-three billion, five hundred ten million, six hundred sixty-five thousand, six hundred forty-two".