63313831505 has 8 divisors (see below), whose sum is σ = 75994404072. Its totient is φ = 50639194368.

The previous prime is 63313831487. The next prime is 63313831507. The reversal of 63313831505 is 50513831336.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 97792321 + 63216039184 = 9889^2 + 251428^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 63313831505 - 2³⁴ = 46133962321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63313831507) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1460354 + ... + 1503083.

It is an arithmetic number, because the mean of its divisors is an integer number (9499300509).

Almost surely, 2^63313831505 is an apocalyptic number.

It is an amenable number.

63313831505 is a deficient number, since it is larger than the sum of its proper divisors (12680572567).

63313831505 is a wasteful number, since it uses less digits than its factorization.

63313831505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2967715.

The product of its (nonzero) digits is 97200, while the sum is 38.

The spelling of 63313831505 in words is "sixty-three billion, three hundred thirteen million, eight hundred thirty-one thousand, five hundred five".