678008180540 has 48 divisors (see below), whose sum is σ = 1489889352672. Its totient is φ = 258894694656.

The previous prime is 678008180537. The next prime is 678008180587. The reversal of 678008180540 is 45081800876.

It is a happy number.

It is a super-2 number, since 2×678008180540² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8604434 + ... + 8682873.

It is an arithmetic number, because the mean of its divisors is an integer number (31039361514).

Almost surely, 2^678008180540 is an apocalyptic number.

It is an amenable number.

678008180540 is an abundant number, since it is smaller than the sum of its proper divisors (811881172132).

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

678008180540 is a wasteful number, since it uses less digits than its factorization.

678008180540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17287406 (or 17287404 counting only the distinct ones).

The product of its (nonzero) digits is 430080, while the sum is 47.

The spelling of 678008180540 in words is "six hundred seventy-eight billion, eight million, one hundred eighty thousand, five hundred forty".