681001074943 has 32 divisors (see below), whose sum is σ = 800469153792. Its totient is φ = 567223020000.

The previous prime is 681001074917. The next prime is 681001074953. The reversal of 681001074943 is 349470100186.

It is not a de Polignac number, because 681001074943 - 2⁹ = 681001074431 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a self number, because there is not a number n which added to its sum of digits gives 681001074943.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681001074953) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 73355380 + ... + 73364662.

It is an arithmetic number, because the mean of its divisors is an integer number (25014661056).

Almost surely, 2^681001074943 is an apocalyptic number.

681001074943 is a deficient number, since it is larger than the sum of its proper divisors (119468078849).

681001074943 is a wasteful number, since it uses less digits than its factorization.

681001074943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10555.

The product of its (nonzero) digits is 145152, while the sum is 43.

The spelling of 681001074943 in words is "six hundred eighty-one billion, one million, seventy-four thousand, nine hundred forty-three".