768725701981 has 2 divisors, whose sum is σ = 768725701982. Its totient is φ = 768725701980.

The previous prime is 768725701967. The next prime is 768725702011. The reversal of 768725701981 is 189107527867.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 762375205881 + 6350496100 = 873141^2 + 79690^2 .

It is a cyclic number.

It is not a de Polignac number, because 768725701981 - 2¹¹ = 768725699933 is a prime.

It is a super-2 number, since 2×768725701981² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (765725701981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 384362850990 + 384362850991.

It is an arithmetic number, because the mean of its divisors is an integer number (384362850991).

Almost surely, 2^768725701981 is an apocalyptic number.

It is an amenable number.

768725701981 is a deficient number, since it is larger than the sum of its proper divisors (1).

768725701981 is an equidigital number, since it uses as much as digits as its factorization.

768725701981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11854080, while the sum is 61.

The spelling of 768725701981 in words is "seven hundred sixty-eight billion, seven hundred twenty-five million, seven hundred one thousand, nine hundred eighty-one".