785520851955 has 48 divisors (see below), whose sum is σ = 1486810909440. Its totient is φ = 353008867008.

The previous prime is 785520851939. The next prime is 785520851959. The reversal of 785520851955 is 559158025587.

It is not a de Polignac number, because 785520851955 - 2⁴ = 785520851939 is a prime.

It is a super-2 number, since 2×785520851955² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (785520851959) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9013719 + ... + 9100448.

It is an arithmetic number, because the mean of its divisors is an integer number (30975227280).

Almost surely, 2^785520851955 is an apocalyptic number.

785520851955 is a deficient number, since it is larger than the sum of its proper divisors (701290057485).

785520851955 is a wasteful number, since it uses less digits than its factorization.

785520851955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18114248 (or 18114241 counting only the distinct ones).

The product of its (nonzero) digits is 25200000, while the sum is 60.

The spelling of 785520851955 in words is "seven hundred eighty-five billion, five hundred twenty million, eight hundred fifty-one thousand, nine hundred fifty-five".