645365361104 has 10 divisors (see below), whose sum is σ = 1250395387170. Its totient is φ = 322682680544.

The previous prime is 645365361097. The next prime is 645365361149. The reversal of 645365361104 is 401163563546.

It can be written as a sum of positive squares in only one way, i.e., 533408201104 + 111957160000 = 730348^2 + 334600^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20167667519 + ... + 20167667550.

It is an arithmetic number, because the mean of its divisors is an integer number (125039538717).

Almost surely, 2^645365361104 is an apocalyptic number.

It is an amenable number.

645365361104 is a deficient number, since it is larger than the sum of its proper divisors (605030026066).

645365361104 is a wasteful number, since it uses less digits than its factorization.

645365361104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40335335077 (or 40335335071 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 44.

The spelling of 645365361104 in words is "six hundred forty-five billion, three hundred sixty-five million, three hundred sixty-one thousand, one hundred four".