63865000771 has 16 divisors (see below), whose sum is σ = 75041406720. Its totient is φ = 53585010720.

The previous prime is 63865000757. The next prime is 63865000781. The reversal of 63865000771 is 17700056836.

It is a cyclic number.

It is not a de Polignac number, because 63865000771 - 2¹³ = 63864992579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63865000711) 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, 1051396 + ... + 1110478.

It is an arithmetic number, because the mean of its divisors is an integer number (4690087920).

Almost surely, 2^63865000771 is an apocalyptic number.

63865000771 is a deficient number, since it is larger than the sum of its proper divisors (11176405949).

63865000771 is a wasteful number, since it uses less digits than its factorization.

With its successor (63865000772) it forms an eRAP, since the sums of their prime factors are consecutive (66666 and 66667).

63865000771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66666.

The product of its (nonzero) digits is 211680, while the sum is 43.

The spelling of 63865000771 in words is "sixty-three billion, eight hundred sixty-five million, seven hundred seventy-one", and thus it is an aban number.