51841873465 has 4 divisors (see below), whose sum is σ = 62210248164. Its totient is φ = 41473498768.

The previous prime is 51841873453. The next prime is 51841873481. The reversal of 51841873465 is 56437814815.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 30048142336 + 21793731129 = 173344^2 + 147627^2 .

It is a cyclic number.

It is not a de Polignac number, because 51841873465 - 2¹⁹ = 51841349177 is a prime.

It is a super-2 number, since 2×51841873465² (a number of 22 digits) contains 22 as substring.

It is a Duffinian 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 3 ways as a sum of consecutive naturals, for example, 5184187342 + ... + 5184187351.

It is an arithmetic number, because the mean of its divisors is an integer number (15552562041).

Almost surely, 2^51841873465 is an apocalyptic number.

It is an amenable number.

51841873465 is a deficient number, since it is larger than the sum of its proper divisors (10368374699).

51841873465 is a wasteful number, since it uses less digits than its factorization.

51841873465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10368374698.

The product of its digits is 3225600, while the sum is 52.

The spelling of 51841873465 in words is "fifty-one billion, eight hundred forty-one million, eight hundred seventy-three thousand, four hundred sixty-five".