709745661631 has 2 divisors, whose sum is σ = 709745661632. Its totient is φ = 709745661630.

The previous prime is 709745661619. The next prime is 709745661671. The reversal of 709745661631 is 136166547907.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 709745661631 - 2¹¹ = 709745659583 is a prime.

It is a super-2 number, since 2×709745661631² (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 (709745661671) 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, 354872830815 + 354872830816.

It is an arithmetic number, because the mean of its divisors is an integer number (354872830816).

Almost surely, 2^709745661631 is an apocalyptic number.

709745661631 is a deficient number, since it is larger than the sum of its proper divisors (1).

709745661631 is an equidigital number, since it uses as much as digits as its factorization.

709745661631 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5715360, while the sum is 55.

The spelling of 709745661631 in words is "seven hundred nine billion, seven hundred forty-five million, six hundred sixty-one thousand, six hundred thirty-one".