253464968585565 has 64 divisors (see below), whose sum is σ = 520484213617920. Its totient is φ = 115663158558720.

The previous prime is 253464968585561. The next prime is 253464968585597. The reversal of 253464968585565 is 565585869464352.

It is a happy number.

253464968585565 is a `hidden beast` number, since 2 + 5 + 3 + 4 + 6 + 4 + 9 + 6 + 8 + 58 + 556 + 5 = 666.

253464968585565 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 253464968585565 - 2² = 253464968585561 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253464968585561) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5020077124 + ... + 5020127613.

It is an arithmetic number, because the mean of its divisors is an integer number (8132565837780).

Almost surely, 2^{253464968585565} is an apocalyptic number.

It is an amenable number.

253464968585565 is an abundant number, since it is smaller than the sum of its proper divisors (267019245032355).

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

253464968585565 is a wasteful number, since it uses less digits than its factorization.

253464968585565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10040204779 (or 10040204773 counting only the distinct ones).

The product of its digits is 37324800000, while the sum is 81.

The spelling of 253464968585565 in words is "two hundred fifty-three trillion, four hundred sixty-four billion, nine hundred sixty-eight million, five hundred eighty-five thousand, five hundred sixty-five".