51909339147 has 32 divisors (see below), whose sum is σ = 72519763968. Its totient is φ = 32965274496.

The previous prime is 51909339133. The next prime is 51909339151. The reversal of 51909339147 is 74193390915.

It is not a de Polignac number, because 51909339147 - 2⁷ = 51909339019 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51909339147.

It is not an unprimeable number, because it can be changed into a prime (51909339187) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 34767733 + ... + 34769225.

It is an arithmetic number, because the mean of its divisors is an integer number (2266242624).

Almost surely, 2^51909339147 is an apocalyptic number.

51909339147 is a deficient number, since it is larger than the sum of its proper divisors (20610424821).

51909339147 is a wasteful number, since it uses less digits than its factorization.

51909339147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3259.

The product of its (nonzero) digits is 918540, while the sum is 51.

The spelling of 51909339147 in words is "fifty-one billion, nine hundred nine million, three hundred thirty-nine thousand, one hundred forty-seven".