678842487732 has 12 divisors (see below), whose sum is σ = 1583965804736. Its totient is φ = 226280829240.

The previous prime is 678842487703. The next prime is 678842487737. The reversal of 678842487732 is 237784248876.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678842487737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28285103644 + ... + 28285103667.

Almost surely, 2^678842487732 is an apocalyptic number.

It is an amenable number.

678842487732 is an abundant number, since it is smaller than the sum of its proper divisors (905123317004).

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

678842487732 is a wasteful number, since it uses less digits than its factorization.

678842487732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56570207318 (or 56570207316 counting only the distinct ones).

The product of its digits is 202309632, while the sum is 66.

The spelling of 678842487732 in words is "six hundred seventy-eight billion, eight hundred forty-two million, four hundred eighty-seven thousand, seven hundred thirty-two".