77901930907 has 2 divisors, whose sum is σ = 77901930908. Its totient is φ = 77901930906.

The previous prime is 77901930901. The next prime is 77901930917. The reversal of 77901930907 is 70903910977.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77901930907 is a prime.

It is not a weakly prime, because it can be changed into another prime (77901930901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38950965453 + 38950965454.

It is an arithmetic number, because the mean of its divisors is an integer number (38950965454).

Almost surely, 2^77901930907 is an apocalyptic number.

77901930907 is a deficient number, since it is larger than the sum of its proper divisors (1).

77901930907 is an equidigital number, since it uses as much as digits as its factorization.

77901930907 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 750141, while the sum is 52.

The spelling of 77901930907 in words is "seventy-seven billion, nine hundred one million, nine hundred thirty thousand, nine hundred seven".