681425006279 has 4 divisors (see below), whose sum is σ = 683832868776. Its totient is φ = 679017143784.

The previous prime is 681425006237. The next prime is 681425006287. The reversal of 681425006279 is 972600524186.

681425006279 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 972600524186 = 2 ⋅486300262093.

It is a cyclic number.

It is not a de Polignac number, because 681425006279 - 2²⁰ = 681423957703 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 (681425006299) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1203930824 + ... + 1203931389.

It is an arithmetic number, because the mean of its divisors is an integer number (170958217194).

Almost surely, 2^681425006279 is an apocalyptic number.

681425006279 is a deficient number, since it is larger than the sum of its proper divisors (2407862497).

681425006279 is a wasteful number, since it uses less digits than its factorization.

681425006279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2407862496.

The product of its (nonzero) digits is 1451520, while the sum is 50.

The spelling of 681425006279 in words is "six hundred eighty-one billion, four hundred twenty-five million, six thousand, two hundred seventy-nine".