770648398109 has 4 divisors (see below), whose sum is σ = 770653928316. Its totient is φ = 770642867904.

The previous prime is 770648398103. The next prime is 770648398141. The reversal of 770648398109 is 901893846077.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 683924038009 + 86724360100 = 826997^2 + 294490^2 .

It is a cyclic number.

It is not a de Polignac number, because 770648398109 - 2⁸ = 770648397853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (770648398103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2550524 + ... + 2836629.

It is an arithmetic number, because the mean of its divisors is an integer number (192663482079).

Almost surely, 2^770648398109 is an apocalyptic number.

It is an amenable number.

770648398109 is a deficient number, since it is larger than the sum of its proper divisors (5530207).

770648398109 is a wasteful number, since it uses less digits than its factorization.

770648398109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5530206.

The product of its (nonzero) digits is 18289152, while the sum is 62.

The spelling of 770648398109 in words is "seven hundred seventy billion, six hundred forty-eight million, three hundred ninety-eight thousand, one hundred nine".