678533687508 has 48 divisors (see below), whose sum is σ = 1730454050304. Its totient is φ = 206006430720.

The previous prime is 678533687437. The next prime is 678533687509. The reversal of 678533687508 is 805786335876.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678533687509) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53641185 + ... + 53653832.

It is an arithmetic number, because the mean of its divisors is an integer number (36051126048).

Almost surely, 2^678533687508 is an apocalyptic number.

678533687508 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

678533687508 is an abundant number, since it is smaller than the sum of its proper divisors (1051920362796).

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

678533687508 is a wasteful number, since it uses less digits than its factorization.

678533687508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107295072 (or 107295070 counting only the distinct ones).

The product of its (nonzero) digits is 203212800, while the sum is 66.

The spelling of 678533687508 in words is "six hundred seventy-eight billion, five hundred thirty-three million, six hundred eighty-seven thousand, five hundred eight".