263247047606551 has 4 divisors (see below), whose sum is σ = 263673704086272. Its totient is φ = 262820391126832.

The previous prime is 263247047606513. The next prime is 263247047606593. The reversal of 263247047606551 is 155606740742362.

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 263247047606551 - 2²⁵ = 263247014052119 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 (263247047606251) 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, 213328238935 + ... + 213328240168.

It is an arithmetic number, because the mean of its divisors is an integer number (65918426021568).

Almost surely, 2^{263247047606551} is an apocalyptic number.

263247047606551 is a deficient number, since it is larger than the sum of its proper divisors (426656479721).

263247047606551 is an equidigital number, since it uses as much as digits as its factorization.

263247047606551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426656479720.

The product of its (nonzero) digits is 50803200, while the sum is 58.

The spelling of 263247047606551 in words is "two hundred sixty-three trillion, two hundred forty-seven billion, forty-seven million, six hundred six thousand, five hundred fifty-one".