681378650572 has 48 divisors (see below), whose sum is σ = 1205700914880. Its totient is φ = 336919396352.

The previous prime is 681378650567. The next prime is 681378650627. The reversal of 681378650572 is 275056873186.

It is a happy number.

681378650572 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 101862204 + ... + 101868892.

It is an arithmetic number, because the mean of its divisors is an integer number (25118769060).

Almost surely, 2^681378650572 is an apocalyptic number.

It is an amenable number.

681378650572 is a deficient number, since it is larger than the sum of its proper divisors (524322264308).

681378650572 is a wasteful number, since it uses less digits than its factorization.

681378650572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7650 (or 7648 counting only the distinct ones).

The product of its (nonzero) digits is 16934400, while the sum is 58.

The spelling of 681378650572 in words is "six hundred eighty-one billion, three hundred seventy-eight million, six hundred fifty thousand, five hundred seventy-two".