51352085210985 has 24 divisors (see below), whose sum is σ = 95857225728264. Its totient is φ = 25281026565120.

The previous prime is 51352085210983. The next prime is 51352085211047. The reversal of 51352085210985 is 58901258025315.

51352085210985 is a `hidden beast` number, since 5 + 1 + 3 + 5 + 20 + 8 + 521 + 0 + 98 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 165916099584 + 51186169111401 = 407328^2 + 7154451^2 .

It is not a de Polignac number, because 51352085210985 - 2¹ = 51352085210983 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51352085210983) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 43890670536 + ... + 43890671705.

It is an arithmetic number, because the mean of its divisors is an integer number (3994051072011).

Almost surely, 2^{51352085210985} is an apocalyptic number.

It is an amenable number.

51352085210985 is a deficient number, since it is larger than the sum of its proper divisors (44505140517279).

51352085210985 is a wasteful number, since it uses less digits than its factorization.

51352085210985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87781342265 (or 87781342262 counting only the distinct ones).

The product of its (nonzero) digits is 4320000, while the sum is 54.

The spelling of 51352085210985 in words is "fifty-one trillion, three hundred fifty-two billion, eighty-five million, two hundred ten thousand, nine hundred eighty-five".