678137512 has 48 divisors (see below), whose sum is σ = 1449360000. Its totient is φ = 296502336.

The previous prime is 678137503. The next prime is 678137557. The reversal of 678137512 is 215731876.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12489 + ... + 38887.

It is an arithmetic number, because the mean of its divisors is an integer number (30195000).

Almost surely, 2^678137512 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 678137512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (724680000).

678137512 is an abundant number, since it is smaller than the sum of its proper divisors (771222488).

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

678137512 is a wasteful number, since it uses less digits than its factorization.

678137512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26450 (or 26433 counting only the distinct ones).

The product of its digits is 70560, while the sum is 40.

The square root of 678137512 is about 26041.0735569792. The cubic root of 678137512 is about 878.5623530231.

The spelling of 678137512 in words is "six hundred seventy-eight million, one hundred thirty-seven thousand, five hundred twelve".