646015967805 has 32 divisors (see below), whose sum is σ = 1113190404480. Its totient is φ = 318022859520.

The previous prime is 646015967789. The next prime is 646015967819. The reversal of 646015967805 is 508769510646.

646015967805 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 646015967805 - 2⁴ = 646015967789 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4519735 + ... + 4660475.

It is an arithmetic number, because the mean of its divisors is an integer number (34787200140).

Almost surely, 2^646015967805 is an apocalyptic number.

646015967805 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

646015967805 is a deficient number, since it is larger than the sum of its proper divisors (467174436675).

646015967805 is a wasteful number, since it uses less digits than its factorization.

646015967805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164301.

The product of its (nonzero) digits is 10886400, while the sum is 57.

The spelling of 646015967805 in words is "six hundred forty-six billion, fifteen million, nine hundred sixty-seven thousand, eight hundred five".