681460018951 has 2 divisors, whose sum is σ = 681460018952. Its totient is φ = 681460018950.

The previous prime is 681460018949. The next prime is 681460018979. The reversal of 681460018951 is 159810064186.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 681460018951 - 2¹ = 681460018949 is a prime.

Together with 681460018949, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 681460018895 and 681460018904.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (681460018901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340730009475 + 340730009476.

It is an arithmetic number, because the mean of its divisors is an integer number (340730009476).

Almost surely, 2^681460018951 is an apocalyptic number.

681460018951 is a deficient number, since it is larger than the sum of its proper divisors (1).

681460018951 is an equidigital number, since it uses as much as digits as its factorization.

681460018951 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 414720, while the sum is 49.

The spelling of 681460018951 in words is "six hundred eighty-one billion, four hundred sixty million, eighteen thousand, nine hundred fifty-one".