51394267085 has 32 divisors (see below), whose sum is σ = 71295178752. Its totient is φ = 34836848640.

The previous prime is 51394267081. The next prime is 51394267091. The reversal of 51394267085 is 58076249315.

It is a happy number.

It is not a de Polignac number, because 51394267085 - 2² = 51394267081 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51394267081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2982404 + ... + 2999586.

It is an arithmetic number, because the mean of its divisors is an integer number (2227974336).

It is a 1-persistent number, because it is pandigital, but 2⋅51394267085 = 102788534170 is not.

Almost surely, 2^51394267085 is an apocalyptic number.

It is an amenable number.

51394267085 is a deficient number, since it is larger than the sum of its proper divisors (19900911667).

51394267085 is a wasteful number, since it uses less digits than its factorization.

51394267085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18173.

The product of its (nonzero) digits is 1814400, while the sum is 50.

The spelling of 51394267085 in words is "fifty-one billion, three hundred ninety-four million, two hundred sixty-seven thousand, eighty-five".