681861782270 has 16 divisors (see below), whose sum is σ = 1240004315088. Its totient is φ = 269932911360.

The previous prime is 681861782269. The next prime is 681861782297. The reversal of 681861782270 is 72287168186.

681861782270 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 351474176 + ... + 351476115.

It is an arithmetic number, because the mean of its divisors is an integer number (77500269693).

Almost surely, 2^681861782270 is an apocalyptic number.

681861782270 is a deficient number, since it is larger than the sum of its proper divisors (558142532818).

681861782270 is a wasteful number, since it uses less digits than its factorization.

681861782270 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 702950395.

The product of its (nonzero) digits is 3612672, while the sum is 56.

The spelling of 681861782270 in words is "six hundred eighty-one billion, eight hundred sixty-one million, seven hundred eighty-two thousand, two hundred seventy".