51978444305 has 16 divisors (see below), whose sum is σ = 65669702400. Its totient is φ = 39386557440.

The previous prime is 51978444283. The next prime is 51978444307. The reversal of 51978444305 is 50344487915.

It is a happy number.

It is not a de Polignac number, because 51978444305 - 2⁶ = 51978444241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51978444307) 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 15 ways as a sum of consecutive naturals, for example, 466616 + ... + 567174.

It is an arithmetic number, because the mean of its divisors is an integer number (4104356400).

Almost surely, 2^51978444305 is an apocalyptic number.

It is an amenable number.

51978444305 is a deficient number, since it is larger than the sum of its proper divisors (13691258095).

51978444305 is a wasteful number, since it uses less digits than its factorization.

51978444305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106024.

The product of its (nonzero) digits is 2419200, while the sum is 50.

The spelling of 51978444305 in words is "fifty-one billion, nine hundred seventy-eight million, four hundred forty-four thousand, three hundred five".