681426140984071 has 8 divisors (see below), whose sum is σ = 803894433603584. Its totient is φ = 565238273627160.

The previous prime is 681426140983999. The next prime is 681426140984087. The reversal of 681426140984071 is 170489041624186.

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

It is not a de Polignac number, because 681426140984071 - 2¹⁹ = 681426140459783 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681426140988071) 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, 1570106315415 + ... + 1570106315848.

It is an arithmetic number, because the mean of its divisors is an integer number (100486804200448).

Almost surely, 2^{681426140984071} is an apocalyptic number.

681426140984071 is a deficient number, since it is larger than the sum of its proper divisors (122468292619513).

681426140984071 is a wasteful number, since it uses less digits than its factorization.

681426140984071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3140212631301.

The product of its (nonzero) digits is 18579456, while the sum is 61.

The spelling of 681426140984071 in words is "six hundred eighty-one trillion, four hundred twenty-six billion, one hundred forty million, nine hundred eighty-four thousand, seventy-one".