634245765223 has 6 divisors (see below), whose sum is σ = 737796094296. Its totient is φ = 543639227292.

The previous prime is 634245765217. The next prime is 634245765229. The reversal of 634245765223 is 322567542436.

It is an interprime number because it is at equal distance from previous prime (634245765217) and next prime (634245765229).

It is a de Polignac number, because none of the positive numbers 2^k-634245765223 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49), and also a Moran number because the ratio is a prime number: 12943791127 = 634245765223 / (6 + 3 + 4 + 2 + 4 + 5 + 7 + 6 + 5 + 2 + 2 + 3).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634245765229) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6471895515 + ... + 6471895612.

It is an arithmetic number, because the mean of its divisors is an integer number (122966015716).

Almost surely, 2^634245765223 is an apocalyptic number.

634245765223 is a deficient number, since it is larger than the sum of its proper divisors (103550329073).

634245765223 is a wasteful number, since it uses less digits than its factorization.

634245765223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12943791141 (or 12943791134 counting only the distinct ones).

The product of its digits is 7257600, while the sum is 49.

The spelling of 634245765223 in words is "six hundred thirty-four billion, two hundred forty-five million, seven hundred sixty-five thousand, two hundred twenty-three".