76786045909 has 2 divisors, whose sum is σ = 76786045910. Its totient is φ = 76786045908.

The previous prime is 76786045901. The next prime is 76786045991. The reversal of 76786045909 is 90954068767.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45559621809 + 31226424100 = 213447^2 + 176710^2 .

It is a cyclic number.

It is not a de Polignac number, because 76786045909 - 2³ = 76786045901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (76786045901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38393022954 + 38393022955.

It is an arithmetic number, because the mean of its divisors is an integer number (38393022955).

Almost surely, 2^76786045909 is an apocalyptic number.

It is an amenable number.

76786045909 is a deficient number, since it is larger than the sum of its proper divisors (1).

76786045909 is an equidigital number, since it uses as much as digits as its factorization.

76786045909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22861440, while the sum is 61.

The spelling of 76786045909 in words is "seventy-six billion, seven hundred eighty-six million, forty-five thousand, nine hundred nine".