1680725155939 has 2 divisors, whose sum is σ = 1680725155940. Its totient is φ = 1680725155938.

The previous prime is 1680725155913. The next prime is 1680725155951. The reversal of 1680725155939 is 9395515270861.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1680725155939 - 2²¹ = 1680723058787 is a prime.

It is not a weakly prime, because it can be changed into another prime (1680725150939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 840362577969 + 840362577970.

It is an arithmetic number, because the mean of its divisors is an integer number (840362577970).

Almost surely, 2^{1680725155939} is an apocalyptic number.

1680725155939 is a deficient number, since it is larger than the sum of its proper divisors (1).

1680725155939 is an equidigital number, since it uses as much as digits as its factorization.

1680725155939 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20412000, while the sum is 61.

The spelling of 1680725155939 in words is "one trillion, six hundred eighty billion, seven hundred twenty-five million, one hundred fifty-five thousand, nine hundred thirty-nine".