51807434311445 has 4 divisors (see below), whose sum is σ = 62168921173740. Its totient is φ = 41445947449152.

The previous prime is 51807434311387. The next prime is 51807434311463. The reversal of 51807434311445 is 54411343470815.

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 34867147235281 + 16940287076164 = 5904841^2 + 4115858^2 .

It is a cyclic number.

It is not a de Polignac number, because 51807434311445 - 2¹⁶ = 51807434245909 is a prime.

It is a super-2 number, since 2×51807434311445² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51807434311393 and 51807434311402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5180743431140 + ... + 5180743431149.

It is an arithmetic number, because the mean of its divisors is an integer number (15542230293435).

Almost surely, 2^{51807434311445} is an apocalyptic number.

It is an amenable number.

51807434311445 is a deficient number, since it is larger than the sum of its proper divisors (10361486862295).

51807434311445 is a wasteful number, since it uses less digits than its factorization.

51807434311445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10361486862294.

The product of its (nonzero) digits is 3225600, while the sum is 50.

The spelling of 51807434311445 in words is "fifty-one trillion, eight hundred seven billion, four hundred thirty-four million, three hundred eleven thousand, four hundred forty-five".