721677125011 has 2 divisors, whose sum is σ = 721677125012. Its totient is φ = 721677125010.

The previous prime is 721677124981. The next prime is 721677125021. The reversal of 721677125011 is 110521776127.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 721677125011 - 2³⁹ = 171921311123 is a prime.

It is not a weakly prime, because it can be changed into another prime (721677125021) 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, 360838562505 + 360838562506.

It is an arithmetic number, because the mean of its divisors is an integer number (360838562506).

Almost surely, 2^721677125011 is an apocalyptic number.

721677125011 is a deficient number, since it is larger than the sum of its proper divisors (1).

721677125011 is an equidigital number, since it uses as much as digits as its factorization.

721677125011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41160, while the sum is 40.

The spelling of 721677125011 in words is "seven hundred twenty-one billion, six hundred seventy-seven million, one hundred twenty-five thousand, eleven".