51845454815 has 16 divisors (see below), whose sum is σ = 77566187520. Its totient is φ = 32319244320.

The previous prime is 51845454809. The next prime is 51845454883.

51845454815 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 51845454815 - 2⁸ = 51845454559 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67331375 + ... + 67332144.

It is an arithmetic number, because the mean of its divisors is an integer number (4847886720).

Almost surely, 2^51845454815 is an apocalyptic number.

51845454815 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

51845454815 is a deficient number, since it is larger than the sum of its proper divisors (25720732705).

51845454815 is a wasteful number, since it uses less digits than its factorization.

51845454815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134663542.

The product of its digits is 2560000, while the sum is 50.

The spelling of 51845454815 in words is "fifty-one billion, eight hundred forty-five million, four hundred fifty-four thousand, eight hundred fifteen".