63440280825 has 96 divisors (see below), whose sum is σ = 112428518400. Its totient is φ = 31453470720.

The previous prime is 63440280811. The next prime is 63440280829. The reversal of 63440280825 is 52808204436.

It is not a de Polignac number, because 63440280825 - 2⁸ = 63440280569 is a prime.

It is not an unprimeable number, because it can be changed into a prime (63440280829) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 66568549 + ... + 66569501.

It is an arithmetic number, because the mean of its divisors is an integer number (1171130400).

Almost surely, 2^63440280825 is an apocalyptic number.

It is an amenable number.

63440280825 is a deficient number, since it is larger than the sum of its proper divisors (48988237575).

63440280825 is a wasteful number, since it uses less digits than its factorization.

63440280825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1571 (or 1566 counting only the distinct ones).

The product of its (nonzero) digits is 368640, while the sum is 42.

The spelling of 63440280825 in words is "sixty-three billion, four hundred forty million, two hundred eighty thousand, eight hundred twenty-five".