253243540663 has 16 divisors (see below), whose sum is σ = 262210950144. Its totient is φ = 244327006080.

The previous prime is 253243540661. The next prime is 253243540699. The reversal of 253243540663 is 366045342352.

It is a cyclic number.

It is not a de Polignac number, because 253243540663 - 2¹ = 253243540661 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 (253243540661) 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, 17176831 + ... + 17191567.

It is an arithmetic number, because the mean of its divisors is an integer number (16388184384).

Almost surely, 2^253243540663 is an apocalyptic number.

253243540663 is a deficient number, since it is larger than the sum of its proper divisors (8967409481).

253243540663 is a wasteful number, since it uses less digits than its factorization.

253243540663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16422.

The product of its (nonzero) digits is 1555200, while the sum is 43.

The spelling of 253243540663 in words is "two hundred fifty-three billion, two hundred forty-three million, five hundred forty thousand, six hundred sixty-three".