782409988664 has 16 divisors (see below), whose sum is σ = 1467029745000. Its totient is φ = 391202056672.

The previous prime is 782409988631. The next prime is 782409988669. The reversal of 782409988664 is 466889904287.

782409988664 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×782409988664² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (782409988669) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1118159 + ... + 1677825.

Almost surely, 2^782409988664 is an apocalyptic number.

It is an amenable number.

782409988664 is a deficient number, since it is larger than the sum of its proper divisors (684619756336).

782409988664 is a wasteful number, since it uses less digits than its factorization.

782409988664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 734422 (or 734418 counting only the distinct ones).

The product of its (nonzero) digits is 334430208, while the sum is 71.

The spelling of 782409988664 in words is "seven hundred eighty-two billion, four hundred nine million, nine hundred eighty-eight thousand, six hundred sixty-four".