645106424644 has 48 divisors (see below), whose sum is σ = 1242115592256. Its totient is φ = 290722723200.

The previous prime is 645106424639. The next prime is 645106424653. The reversal of 645106424644 is 446424601546.

645106424644 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 645106424594 and 645106424603.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6248854 + ... + 6351250.

It is an arithmetic number, because the mean of its divisors is an integer number (25877408172).

Almost surely, 2^645106424644 is an apocalyptic number.

It is an amenable number.

645106424644 is a deficient number, since it is larger than the sum of its proper divisors (597009167612).

645106424644 is a wasteful number, since it uses less digits than its factorization.

645106424644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103636 (or 103634 counting only the distinct ones).

The product of its (nonzero) digits is 2211840, while the sum is 46.

The spelling of 645106424644 in words is "six hundred forty-five billion, one hundred six million, four hundred twenty-four thousand, six hundred forty-four".