681226356 has 24 divisors (see below), whose sum is σ = 1644340320. Its totient is φ = 219245152.

The previous prime is 681226321. The next prime is 681226367. The reversal of 681226356 is 653622186.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 978426 + ... + 979121.

It is an arithmetic number, because the mean of its divisors is an integer number (68514180).

Almost surely, 2^681226356 is an apocalyptic number.

It is an amenable number.

681226356 is an abundant number, since it is smaller than the sum of its proper divisors (963113964).

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

681226356 is a wasteful number, since it uses less digits than its factorization.

681226356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1957583 (or 1957581 counting only the distinct ones).

The product of its digits is 103680, while the sum is 39.

The square root of 681226356 is about 26100.3133314526. The cubic root of 681226356 is about 879.8942521002.

The spelling of 681226356 in words is "six hundred eighty-one million, two hundred twenty-six thousand, three hundred fifty-six".