51004547905 has 8 divisors (see below), whose sum is σ = 61288961832. Its totient is φ = 40747968768.

The previous prime is 51004547863. The next prime is 51004547921. The reversal of 51004547905 is 50974540015.

It can be written as a sum of positive squares in 4 ways, for example, as 7631070736 + 43373477169 = 87356^2 + 208263^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51004547905 - 2¹⁹ = 51004023617 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6954664 + ... + 6961993.

It is an arithmetic number, because the mean of its divisors is an integer number (7661120229).

Almost surely, 2^51004547905 is an apocalyptic number.

It is an amenable number.

51004547905 is a deficient number, since it is larger than the sum of its proper divisors (10284413927).

51004547905 is a wasteful number, since it uses less digits than its factorization.

51004547905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13917395.

The product of its (nonzero) digits is 126000, while the sum is 40.

The spelling of 51004547905 in words is "fifty-one billion, four million, five hundred forty-seven thousand, nine hundred five".