645662613622 has 24 divisors (see below), whose sum is σ = 1061359463304. Its totient is φ = 294407777664.

The previous prime is 645662613619. The next prime is 645662613643. The reversal of 645662613622 is 226316266546.

645662613622 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11479443 + ... + 11535550.

It is an arithmetic number, because the mean of its divisors is an integer number (44223310971).

Almost surely, 2^645662613622 is an apocalyptic number.

645662613622 is a deficient number, since it is larger than the sum of its proper divisors (415696849682).

645662613622 is a wasteful number, since it uses less digits than its factorization.

645662613622 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23015104 (or 23015091 counting only the distinct ones).

The product of its digits is 3732480, while the sum is 49.

The spelling of 645662613622 in words is "six hundred forty-five billion, six hundred sixty-two million, six hundred thirteen thousand, six hundred twenty-two".