681156434 has 16 divisors (see below), whose sum is σ = 1176100800. Its totient is φ = 289823184.

The previous prime is 681156419. The next prime is 681156461. The reversal of 681156434 is 434651186.

681156434 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 7 ways as a sum of consecutive naturals, for example, 173069 + ... + 176960.

It is an arithmetic number, because the mean of its divisors is an integer number (73506300).

Almost surely, 2^681156434 is an apocalyptic number.

681156434 is a deficient number, since it is larger than the sum of its proper divisors (494944366).

681156434 is a wasteful number, since it uses less digits than its factorization.

681156434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 350177.

The product of its digits is 69120, while the sum is 38.

The square root of 681156434 is about 26098.9738112440. The cubic root of 681156434 is about 879.8641465557.

The spelling of 681156434 in words is "six hundred eighty-one million, one hundred fifty-six thousand, four hundred thirty-four".