681376270726156 has 6 divisors (see below), whose sum is σ = 1192408473770780. Its totient is φ = 340688135363076.

The previous prime is 681376270726117. The next prime is 681376270726171. The reversal of 681376270726156 is 651627072673186.

It is a junction number, because it is equal to n+sod(n) for n = 681376270726091 and 681376270726100.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85172033840766 + ... + 85172033840773.

Almost surely, 2^{681376270726156} is an apocalyptic number.

It is an amenable number.

681376270726156 is a deficient number, since it is larger than the sum of its proper divisors (511032203044624).

681376270726156 is a wasteful number, since it uses less digits than its factorization.

681376270726156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170344067681543 (or 170344067681541 counting only the distinct ones).

The product of its (nonzero) digits is 213373440, while the sum is 67.

The spelling of 681376270726156 in words is "six hundred eighty-one trillion, three hundred seventy-six billion, two hundred seventy million, seven hundred twenty-six thousand, one hundred fifty-six".