6645024250644 has 24 divisors (see below), whose sum is σ = 16697753245600. Its totient is φ = 2044622846304.

The previous prime is 6645024250637. The next prime is 6645024250681. The reversal of 6645024250644 is 4460524205466.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 6645024250593 and 6645024250602.

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, 21298154494 + ... + 21298154805.

Almost surely, 2^{6645024250644} is an apocalyptic number.

It is an amenable number.

6645024250644 is an abundant number, since it is smaller than the sum of its proper divisors (10052728994956).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6645024250644 is a wasteful number, since it uses less digits than its factorization.

6645024250644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42596309319 (or 42596309317 counting only the distinct ones).

The product of its (nonzero) digits is 5529600, while the sum is 48.

The spelling of 6645024250644 in words is "six trillion, six hundred forty-five billion, twenty-four million, two hundred fifty thousand, six hundred forty-four".