69738867581 has 2 divisors, whose sum is σ = 69738867582. Its totient is φ = 69738867580.

The previous prime is 69738867563. The next prime is 69738867589. The reversal of 69738867581 is 18576883796.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50225292100 + 19513575481 = 224110^2 + 139691^2 .

It is a cyclic number.

It is not a de Polignac number, because 69738867581 - 2¹⁰ = 69738866557 is a prime.

It is a super-2 number, since 2×69738867581² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (69738867589) 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, 34869433790 + 34869433791.

It is an arithmetic number, because the mean of its divisors is an integer number (34869433791).

Almost surely, 2^69738867581 is an apocalyptic number.

It is an amenable number.

69738867581 is a deficient number, since it is larger than the sum of its proper divisors (1).

69738867581 is an equidigital number, since it uses as much as digits as its factorization.

69738867581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 121927680, while the sum is 68.

The spelling of 69738867581 in words is "sixty-nine billion, seven hundred thirty-eight million, eight hundred sixty-seven thousand, five hundred eighty-one".