638360848965 has 16 divisors (see below), whose sum is σ = 1167288409728. Its totient is φ = 291822102336.

The previous prime is 638360848913. The next prime is 638360848969. The reversal of 638360848965 is 569848063836.

It is a happy number.

It is not a de Polignac number, because 638360848965 - 2⁹ = 638360848453 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 638360848896 and 638360848905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (638360848969) 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, 3039813462 + ... + 3039813671.

It is an arithmetic number, because the mean of its divisors is an integer number (72955525608).

Almost surely, 2^638360848965 is an apocalyptic number.

It is an amenable number.

638360848965 is a deficient number, since it is larger than the sum of its proper divisors (528927560763).

638360848965 is a wasteful number, since it uses less digits than its factorization.

638360848965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6079627148.

The product of its (nonzero) digits is 179159040, while the sum is 66.

The spelling of 638360848965 in words is "six hundred thirty-eight billion, three hundred sixty million, eight hundred forty-eight thousand, nine hundred sixty-five".