253615335551 has 4 divisors (see below), whose sum is σ = 253625407752. Its totient is φ = 253605263352.

The previous prime is 253615335529. The next prime is 253615335553. The reversal of 253615335551 is 155533516352.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 253615335551 - 2²² = 253611141247 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253615335553) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4998236 + ... + 5048721.

It is an arithmetic number, because the mean of its divisors is an integer number (63406351938).

Almost surely, 2^253615335551 is an apocalyptic number.

253615335551 is a deficient number, since it is larger than the sum of its proper divisors (10072201).

253615335551 is a wasteful number, since it uses less digits than its factorization.

253615335551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10072200.

The product of its digits is 1012500, while the sum is 44.

The spelling of 253615335551 in words is "two hundred fifty-three billion, six hundred fifteen million, three hundred thirty-five thousand, five hundred fifty-one".