680951554901 has 2 divisors, whose sum is σ = 680951554902. Its totient is φ = 680951554900.

The previous prime is 680951554879. The next prime is 680951554919. The reversal of 680951554901 is 109455159086.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 453447358225 + 227504196676 = 673385^2 + 476974^2 .

It is a cyclic number.

It is not a de Polignac number, because 680951554901 - 2⁶ = 680951554837 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (680951554601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340475777450 + 340475777451.

It is an arithmetic number, because the mean of its divisors is an integer number (340475777451).

Almost surely, 2^680951554901 is an apocalyptic number.

It is an amenable number.

680951554901 is a deficient number, since it is larger than the sum of its proper divisors (1).

680951554901 is an equidigital number, since it uses as much as digits as its factorization.

680951554901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944000, while the sum is 53.

The spelling of 680951554901 in words is "six hundred eighty billion, nine hundred fifty-one million, five hundred fifty-four thousand, nine hundred one".