253121510663 has 16 divisors (see below), whose sum is σ = 289985109504. Its totient is φ = 216434406240.

The previous prime is 253121510657. The next prime is 253121510683. The reversal of 253121510663 is 366015121352.

It is a cyclic number.

It is not a de Polignac number, because 253121510663 - 2⁶ = 253121510599 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 (253121510623) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4805198 + ... + 4857588.

It is an arithmetic number, because the mean of its divisors is an integer number (18124069344).

Almost surely, 2^253121510663 is an apocalyptic number.

253121510663 is a deficient number, since it is larger than the sum of its proper divisors (36863598841).

253121510663 is an equidigital number, since it uses as much as digits as its factorization.

253121510663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54062.

The product of its (nonzero) digits is 32400, while the sum is 35.

The spelling of 253121510663 in words is "two hundred fifty-three billion, one hundred twenty-one million, five hundred ten thousand, six hundred sixty-three".