77857752605807 has 2 divisors, whose sum is σ = 77857752605808. Its totient is φ = 77857752605806.

The previous prime is 77857752605771. The next prime is 77857752605819. The reversal of 77857752605807 is 70850625775877.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 77857752605807 - 2¹⁰ = 77857752604783 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77857752605827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38928876302903 + 38928876302904.

It is an arithmetic number, because the mean of its divisors is an integer number (38928876302904).

Almost surely, 2^{77857752605807} is an apocalyptic number.

77857752605807 is a deficient number, since it is larger than the sum of its proper divisors (1).

77857752605807 is an equidigital number, since it uses as much as digits as its factorization.

77857752605807 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1613472000, while the sum is 74.

The spelling of 77857752605807 in words is "seventy-seven trillion, eight hundred fifty-seven billion, seven hundred fifty-two million, six hundred five thousand, eight hundred seven".