77484898709 has 2 divisors, whose sum is σ = 77484898710. Its totient is φ = 77484898708.

The previous prime is 77484898679. The next prime is 77484898747. The reversal of 77484898709 is 90789848477.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48445330609 + 29039568100 = 220103^2 + 170410^2 .

It is a cyclic number.

It is not a de Polignac number, because 77484898709 - 2⁸ = 77484898453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77484828709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38742449354 + 38742449355.

It is an arithmetic number, because the mean of its divisors is an integer number (38742449355).

Almost surely, 2^77484898709 is an apocalyptic number.

It is an amenable number.

77484898709 is a deficient number, since it is larger than the sum of its proper divisors (1).

77484898709 is an equidigital number, since it uses as much as digits as its factorization.

77484898709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 227598336, while the sum is 71.

The spelling of 77484898709 in words is "seventy-seven billion, four hundred eighty-four million, eight hundred ninety-eight thousand, seven hundred nine".