64850820867 has 12 divisors (see below), whose sum is σ = 107055323440. Its totient is φ = 37057611888.

The previous prime is 64850820823. The next prime is 64850820877. The reversal of 64850820867 is 76802805846.

64850820867 is a `hidden beast` number, since 6 + 485 + 0 + 82 + 0 + 86 + 7 = 666.

It is not a de Polignac number, because 64850820867 - 2²² = 64846626563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64850820877) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 514688992 + ... + 514689117.

Almost surely, 2^64850820867 is an apocalyptic number.

64850820867 is a deficient number, since it is larger than the sum of its proper divisors (42204502573).

64850820867 is a wasteful number, since it uses less digits than its factorization.

64850820867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1029378122 (or 1029378119 counting only the distinct ones).

The product of its (nonzero) digits is 5160960, while the sum is 54.

The spelling of 64850820867 in words is "sixty-four billion, eight hundred fifty million, eight hundred twenty thousand, eight hundred sixty-seven".