63623947265 has 4 divisors (see below), whose sum is σ = 76348736724. Its totient is φ = 50899157808.

The previous prime is 63623947249. The next prime is 63623947279. The reversal of 63623947265 is 56274932636.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 32990546689 + 30633400576 = 181633^2 + 175024^2 .

It is a cyclic number.

It is not a de Polignac number, because 63623947265 - 2⁴ = 63623947249 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6362394722 + ... + 6362394731.

It is an arithmetic number, because the mean of its divisors is an integer number (19087184181).

Almost surely, 2^63623947265 is an apocalyptic number.

It is an amenable number.

63623947265 is a deficient number, since it is larger than the sum of its proper divisors (12724789459).

63623947265 is a wasteful number, since it uses less digits than its factorization.

63623947265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12724789458.

The product of its digits is 9797760, while the sum is 53.

The spelling of 63623947265 in words is "sixty-three billion, six hundred twenty-three million, nine hundred forty-seven thousand, two hundred sixty-five".