63780708213 has 6 divisors (see below), whose sum is σ = 92127689654. Its totient is φ = 42520472136.

The previous prime is 63780708209. The next prime is 63780708221. The reversal of 63780708213 is 31280708736.

63780708213 is a `hidden beast` number, since 637 + 8 + 0 + 7 + 0 + 8 + 2 + 1 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 50761441809 + 13019266404 = 225303^2 + 114102^2 .

It is not a de Polignac number, because 63780708213 - 2² = 63780708209 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63780708253) 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, 3543372670 + ... + 3543372687.

Almost surely, 2^63780708213 is an apocalyptic number.

It is an amenable number.

63780708213 is a deficient number, since it is larger than the sum of its proper divisors (28346981441).

63780708213 is a wasteful number, since it uses less digits than its factorization.

63780708213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7086745363 (or 7086745360 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 45.

The spelling of 63780708213 in words is "sixty-three billion, seven hundred eighty million, seven hundred eight thousand, two hundred thirteen".