63311838813 has 16 divisors (see below), whose sum is σ = 94091213760. Its totient is φ = 42074738928.

The previous prime is 63311838809. The next prime is 63311838827. The reversal of 63311838813 is 31883811336.

63311838813 is a `hidden beast` number, since 633 + 1 + 1 + 8 + 3 + 8 + 8 + 1 + 3 = 666.

It is not a de Polignac number, because 63311838813 - 2² = 63311838809 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63311838883) 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, 3689995 + ... + 3707112.

It is an arithmetic number, because the mean of its divisors is an integer number (5880700860).

Almost surely, 2^63311838813 is an apocalyptic number.

It is an amenable number.

63311838813 is a deficient number, since it is larger than the sum of its proper divisors (30779374947).

63311838813 is a wasteful number, since it uses less digits than its factorization.

63311838813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7397433 (or 7397427 counting only the distinct ones).

The product of its digits is 248832, while the sum is 45.

The spelling of 63311838813 in words is "sixty-three billion, three hundred eleven million, eight hundred thirty-eight thousand, eight hundred thirteen".