680149494136 has 32 divisors (see below), whose sum is σ = 1470361119840. Its totient is φ = 288913056768.

The previous prime is 680149494121. The next prime is 680149494161. The reversal of 680149494136 is 631494941086.

It is a Smith number, since the sum of its digits (55) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 53734941 + ... + 53747596.

It is an arithmetic number, because the mean of its divisors is an integer number (45948784995).

Almost surely, 2^680149494136 is an apocalyptic number.

It is an amenable number.

680149494136 is an abundant number, since it is smaller than the sum of its proper divisors (790211625704).

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

680149494136 is a wasteful number, since it uses less digits than its factorization.

680149494136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107482663 (or 107482659 counting only the distinct ones).

The product of its (nonzero) digits is 4478976, while the sum is 55.

The spelling of 680149494136 in words is "six hundred eighty billion, one hundred forty-nine million, four hundred ninety-four thousand, one hundred thirty-six".