695721875851 has 2 divisors, whose sum is σ = 695721875852. Its totient is φ = 695721875850.

The previous prime is 695721875837. The next prime is 695721875873. The reversal of 695721875851 is 158578127596.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-695721875851 is a prime.

It is not a weakly prime, because it can be changed into another prime (695721872851) 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, 347860937925 + 347860937926.

It is an arithmetic number, because the mean of its divisors is an integer number (347860937926).

Almost surely, 2^695721875851 is an apocalyptic number.

695721875851 is a deficient number, since it is larger than the sum of its proper divisors (1).

695721875851 is an equidigital number, since it uses as much as digits as its factorization.

695721875851 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 42336000, while the sum is 64.

The spelling of 695721875851 in words is "six hundred ninety-five billion, seven hundred twenty-one million, eight hundred seventy-five thousand, eight hundred fifty-one".