77238722258989 has 2 divisors, whose sum is σ = 77238722258990. Its totient is φ = 77238722258988.

The previous prime is 77238722258981. The next prime is 77238722259031. The reversal of 77238722258989 is 98985222783277.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 76808432177764 + 430290081225 = 8764042^2 + 655965^2 .

It is a cyclic number.

It is not a de Polignac number, because 77238722258989 - 2³ = 77238722258981 is a prime.

It is a super-2 number, since 2×77238722258989² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77238722258981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38619361129494 + 38619361129495.

It is an arithmetic number, because the mean of its divisors is an integer number (38619361129495).

Almost surely, 2^{77238722258989} is an apocalyptic number.

It is an amenable number.

77238722258989 is a deficient number, since it is larger than the sum of its proper divisors (1).

77238722258989 is an equidigital number, since it uses as much as digits as its factorization.

77238722258989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3413975040, while the sum is 79.

The spelling of 77238722258989 in words is "seventy-seven trillion, two hundred thirty-eight billion, seven hundred twenty-two million, two hundred fifty-eight thousand, nine hundred eighty-nine".