681016911427 has 16 divisors (see below), whose sum is σ = 701014237344. Its totient is φ = 661104288000.

The previous prime is 681016911409. The next prime is 681016911437. The reversal of 681016911427 is 724119610186.

It is a cyclic number.

It is not a de Polignac number, because 681016911427 - 2³¹ = 678869427779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (681016911437) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 82135152 + ... + 82143442.

It is an arithmetic number, because the mean of its divisors is an integer number (43813389834).

Almost surely, 2^681016911427 is an apocalyptic number.

681016911427 is a deficient number, since it is larger than the sum of its proper divisors (19997325917).

681016911427 is a wasteful number, since it uses less digits than its factorization.

681016911427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13110.

The product of its (nonzero) digits is 145152, while the sum is 46.

The spelling of 681016911427 in words is "six hundred eighty-one billion, sixteen million, nine hundred eleven thousand, four hundred twenty-seven".