64674047646 has 64 divisors (see below), whose sum is σ = 160112635200. Its totient is φ = 19213504128.

The previous prime is 64674047587. The next prime is 64674047651.

64674047646 is a `hidden beast` number, since 64 + 6 + 74 + 0 + 476 + 46 = 666.

64674047646 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 64674047592 and 64674047601.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1568061 + ... + 1608776.

It is an arithmetic number, because the mean of its divisors is an integer number (2501759925).

Almost surely, 2^64674047646 is an apocalyptic number.

64674047646 is an abundant number, since it is smaller than the sum of its proper divisors (95438587554).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64674047646 is a wasteful number, since it uses less digits than its factorization.

64674047646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3176890 (or 3176884 counting only the distinct ones).

The product of its (nonzero) digits is 16257024, while the sum is 54.

The spelling of 64674047646 in words is "sixty-four billion, six hundred seventy-four million, forty-seven thousand, six hundred forty-six".