681222844 has 12 divisors (see below), whose sum is σ = 1262265984. Its totient is φ = 320575424.

The previous prime is 681222823. The next prime is 681222851. The reversal of 681222844 is 448222186.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5008924 + ... + 5009059.

It is an arithmetic number, because the mean of its divisors is an integer number (105188832).

Almost surely, 2^681222844 is an apocalyptic number.

It is an amenable number.

681222844 is a deficient number, since it is larger than the sum of its proper divisors (581043140).

681222844 is a wasteful number, since it uses less digits than its factorization.

681222844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10018004 (or 10018002 counting only the distinct ones).

The product of its digits is 49152, while the sum is 37.

The square root of 681222844 is about 26100.2460524800. The cubic root of 681222844 is about 879.8927400262.

The spelling of 681222844 in words is "six hundred eighty-one million, two hundred twenty-two thousand, eight hundred forty-four".