645565145404 has 24 divisors (see below), whose sum is σ = 1189254931200. Its totient is φ = 305779621680.

The previous prime is 645565145387. The next prime is 645565145411. The reversal of 645565145404 is 404541565546.

645565145404 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 7 ways as a sum of consecutive naturals, for example, 1522167 + ... + 1899505.

It is an arithmetic number, because the mean of its divisors is an integer number (49552288800).

Almost surely, 2^645565145404 is an apocalyptic number.

It is an amenable number.

645565145404 is a deficient number, since it is larger than the sum of its proper divisors (543689785796).

645565145404 is a wasteful number, since it uses less digits than its factorization.

645565145404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399873 (or 399871 counting only the distinct ones).

The product of its (nonzero) digits is 5760000, while the sum is 49.

The spelling of 645565145404 in words is "six hundred forty-five billion, five hundred sixty-five million, one hundred forty-five thousand, four hundred four".