646164745436 has 48 divisors (see below), whose sum is σ = 1376258579136. Its totient is φ = 259131270144.

The previous prime is 646164745423. The next prime is 646164745439. The reversal of 646164745436 is 634547461646.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646164745439) 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, 3841031 + ... + 4005726.

It is an arithmetic number, because the mean of its divisors is an integer number (28672053732).

Almost surely, 2^646164745436 is an apocalyptic number.

It is an amenable number.

646164745436 is an abundant number, since it is smaller than the sum of its proper divisors (730093833700).

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

646164745436 is a wasteful number, since it uses less digits than its factorization.

646164745436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7846958 (or 7846956 counting only the distinct ones).

The product of its digits is 34836480, while the sum is 56.

The spelling of 646164745436 in words is "six hundred forty-six billion, one hundred sixty-four million, seven hundred forty-five thousand, four hundred thirty-six".