120777755605687 has 2 divisors, whose sum is σ = 120777755605688. Its totient is φ = 120777755605686.

The previous prime is 120777755605657. The next prime is 120777755605697. The reversal of 120777755605687 is 786506557777021.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-120777755605687 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120777755605627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60388877802843 + 60388877802844.

It is an arithmetic number, because the mean of its divisors is an integer number (60388877802844).

Almost surely, 2^{120777755605687} is an apocalyptic number.

120777755605687 is a deficient number, since it is larger than the sum of its proper divisors (1).

120777755605687 is an equidigital number, since it uses as much as digits as its factorization.

120777755605687 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1210104000, while the sum is 73.

The spelling of 120777755605687 in words is "one hundred twenty trillion, seven hundred seventy-seven billion, seven hundred fifty-five million, six hundred five thousand, six hundred eighty-seven".