77612082691939 has 2 divisors, whose sum is σ = 77612082691940. Its totient is φ = 77612082691938.

The previous prime is 77612082691921. The next prime is 77612082692009. The reversal of 77612082691939 is 93919628021677.

It is a happy number.

It is an a-pointer prime, because the next prime (77612082692009) can be obtained adding 77612082691939 to its sum of digits (70).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 77612082691939 - 2⁷ = 77612082691811 is a prime.

It is not a weakly prime, because it can be changed into another prime (77612082691909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38806041345969 + 38806041345970.

It is an arithmetic number, because the mean of its divisors is an integer number (38806041345970).

Almost surely, 2^{77612082691939} is an apocalyptic number.

77612082691939 is a deficient number, since it is larger than the sum of its proper divisors (1).

77612082691939 is an equidigital number, since it uses as much as digits as its factorization.

77612082691939 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 123451776, while the sum is 70.

The spelling of 77612082691939 in words is "seventy-seven trillion, six hundred twelve billion, eighty-two million, six hundred ninety-one thousand, nine hundred thirty-nine".