51540441205 has 16 divisors (see below), whose sum is σ = 67900886784. Its totient is φ = 37245199680.

The previous prime is 51540441167. The next prime is 51540441217. The reversal of 51540441205 is 50214404515.

It is a happy number.

It is not a de Polignac number, because 51540441205 - 2⁷ = 51540441077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2975757 + ... + 2993026.

It is an arithmetic number, because the mean of its divisors is an integer number (4243805424).

Almost surely, 2^51540441205 is an apocalyptic number.

51540441205 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

51540441205 is a deficient number, since it is larger than the sum of its proper divisors (16360445579).

51540441205 is a wasteful number, since it uses less digits than its factorization.

51540441205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5968956.

The product of its (nonzero) digits is 16000, while the sum is 31.

The spelling of 51540441205 in words is "fifty-one billion, five hundred forty million, four hundred forty-one thousand, two hundred five".