681528735043 has 8 divisors (see below), whose sum is σ = 733960861088. Its totient is φ = 629097585984.

The previous prime is 681528735023. The next prime is 681528735073. The reversal of 681528735043 is 340537825186.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 681528735043 - 2⁵ = 681528735011 is a prime.

It is not an unprimeable number, because it can be changed into a prime (681528735023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1905271 + ... + 2234527.

It is an arithmetic number, because the mean of its divisors is an integer number (91745107636).

Almost surely, 2^681528735043 is an apocalyptic number.

681528735043 is a deficient number, since it is larger than the sum of its proper divisors (52432126045).

681528735043 is a wasteful number, since it uses less digits than its factorization.

681528735043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 488493.

The product of its (nonzero) digits is 4838400, while the sum is 52.

The spelling of 681528735043 in words is "six hundred eighty-one billion, five hundred twenty-eight million, seven hundred thirty-five thousand, forty-three".