646354607885 has 48 divisors (see below), whose sum is σ = 904941849600. Its totient is φ = 441898136064.

The previous prime is 646354607869. The next prime is 646354607897. The reversal of 646354607885 is 588706453646.

It is a happy number.

It is not a de Polignac number, because 646354607885 - 2⁴ = 646354607869 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 209242421 + ... + 209245509.

It is an arithmetic number, because the mean of its divisors is an integer number (18852955200).

Almost surely, 2^646354607885 is an apocalyptic number.

It is an amenable number.

646354607885 is a deficient number, since it is larger than the sum of its proper divisors (258587241715).

646354607885 is a wasteful number, since it uses less digits than its factorization.

646354607885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5370 (or 5363 counting only the distinct ones).

The product of its (nonzero) digits is 116121600, while the sum is 62.

The spelling of 646354607885 in words is "six hundred forty-six billion, three hundred fifty-four million, six hundred seven thousand, eight hundred eighty-five".