645325101884 has 24 divisors (see below), whose sum is σ = 1133072895360. Its totient is φ = 321591769776.

The previous prime is 645325101877. The next prime is 645325101923. The reversal of 645325101884 is 488101523546.

645325101884 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, 1231409 + ... + 1675415.

It is an arithmetic number, because the mean of its divisors is an integer number (47211370640).

Almost surely, 2^645325101884 is an apocalyptic number.

It is an amenable number.

645325101884 is a deficient number, since it is larger than the sum of its proper divisors (487747793476).

645325101884 is a wasteful number, since it uses less digits than its factorization.

645325101884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 445217 (or 445215 counting only the distinct ones).

The product of its (nonzero) digits is 921600, while the sum is 47.

The spelling of 645325101884 in words is "six hundred forty-five billion, three hundred twenty-five million, one hundred one thousand, eight hundred eighty-four".