253515255647 has 4 divisors (see below), whose sum is σ = 253530931560. Its totient is φ = 253499579736.

The previous prime is 253515255611. The next prime is 253515255757. The reversal of 253515255647 is 746552515352.

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 253515255647 - 2¹² = 253515251551 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 253515255595 and 253515255604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253515245647) 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, 7813673 + ... + 7846050.

It is an arithmetic number, because the mean of its divisors is an integer number (63382732890).

Almost surely, 2^253515255647 is an apocalyptic number.

253515255647 is a deficient number, since it is larger than the sum of its proper divisors (15675913).

253515255647 is a wasteful number, since it uses less digits than its factorization.

253515255647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15675912.

The product of its digits is 6300000, while the sum is 50.

The spelling of 253515255647 in words is "two hundred fifty-three billion, five hundred fifteen million, two hundred fifty-five thousand, six hundred forty-seven".