785520851959 has 2 divisors, whose sum is σ = 785520851960. Its totient is φ = 785520851958.

The previous prime is 785520851939. The next prime is 785520851971. The reversal of 785520851959 is 959158025587.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 785520851959 - 2⁷ = 785520851831 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 785520851959.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (785520851909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 392760425979 + 392760425980.

It is an arithmetic number, because the mean of its divisors is an integer number (392760425980).

Almost surely, 2^785520851959 is an apocalyptic number.

785520851959 is a deficient number, since it is larger than the sum of its proper divisors (1).

785520851959 is an equidigital number, since it uses as much as digits as its factorization.

785520851959 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45360000, while the sum is 64.

The spelling of 785520851959 in words is "seven hundred eighty-five billion, five hundred twenty million, eight hundred fifty-one thousand, nine hundred fifty-nine".