680243591124 has 36 divisors (see below), whose sum is σ = 1778797899060. Its totient is φ = 218928971520.

The previous prime is 680243591117. The next prime is 680243591173. The reversal of 680243591124 is 421195342086.

680243591124 is a `hidden beast` number, since 6 + 8 + 0 + 2 + 43 + 591 + 12 + 4 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 255700126224 + 424543464900 = 505668^2 + 651570^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a self number, because there is not a number n which added to its sum of digits gives 680243591124.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 325786117 + ... + 325788204.

Almost surely, 2^680243591124 is an apocalyptic number.

It is an amenable number.

680243591124 is an abundant number, since it is smaller than the sum of its proper divisors (1098554307936).

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

680243591124 is a wasteful number, since it uses less digits than its factorization.

680243591124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 651574360 (or 651574355 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 45.

The spelling of 680243591124 in words is "six hundred eighty billion, two hundred forty-three million, five hundred ninety-one thousand, one hundred twenty-four".