77640035783 has 2 divisors, whose sum is σ = 77640035784. Its totient is φ = 77640035782.

The previous prime is 77640035779. The next prime is 77640035807. The reversal of 77640035783 is 38753004677.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 77640035783 - 2² = 77640035779 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77640035713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38820017891 + 38820017892.

It is an arithmetic number, because the mean of its divisors is an integer number (38820017892).

Almost surely, 2^77640035783 is an apocalyptic number.

77640035783 is a deficient number, since it is larger than the sum of its proper divisors (1).

77640035783 is an equidigital number, since it uses as much as digits as its factorization.

77640035783 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2963520, while the sum is 50.

The spelling of 77640035783 in words is "seventy-seven billion, six hundred forty million, thirty-five thousand, seven hundred eighty-three".