77072331389 has 2 divisors, whose sum is σ = 77072331390. Its totient is φ = 77072331388.

The previous prime is 77072331379. The next prime is 77072331431. The reversal of 77072331389 is 98313327077.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 76996815289 + 75516100 = 277483^2 + 8690^2 .

It is a cyclic number.

It is not a de Polignac number, because 77072331389 - 2⁴ = 77072331373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77072331379) 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, 38536165694 + 38536165695.

It is an arithmetic number, because the mean of its divisors is an integer number (38536165695).

Almost surely, 2^77072331389 is an apocalyptic number.

It is an amenable number.

77072331389 is a deficient number, since it is larger than the sum of its proper divisors (1).

77072331389 is an equidigital number, since it uses as much as digits as its factorization.

77072331389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1333584, while the sum is 50.

The spelling of 77072331389 in words is "seventy-seven billion, seventy-two million, three hundred thirty-one thousand, three hundred eighty-nine".