77490604687 has 2 divisors, whose sum is σ = 77490604688. Its totient is φ = 77490604686.

The previous prime is 77490604673. The next prime is 77490604691. The reversal of 77490604687 is 78640609477.

It is a strong prime.

It is an emirp because it is prime and its reverse (78640609477) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 77490604687 - 2⁷ = 77490604559 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77490601687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38745302343 + 38745302344.

It is an arithmetic number, because the mean of its divisors is an integer number (38745302344).

Almost surely, 2^77490604687 is an apocalyptic number.

77490604687 is a deficient number, since it is larger than the sum of its proper divisors (1).

77490604687 is an equidigital number, since it uses as much as digits as its factorization.

77490604687 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14224896, while the sum is 58.

The spelling of 77490604687 in words is "seventy-seven billion, four hundred ninety million, six hundred four thousand, six hundred eighty-seven".