51445205545 has 16 divisors (see below), whose sum is σ = 64483061760. Its totient is φ = 39351178944.

The previous prime is 51445205501. The next prime is 51445205599. The reversal of 51445205545 is 54550254415.

It is a cyclic number.

It is not a de Polignac number, because 51445205545 - 2²⁵ = 51411651113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51445205498 and 51445205507.

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, 1707369 + ... + 1737238.

It is an arithmetic number, because the mean of its divisors is an integer number (4030191360).

Almost surely, 2^51445205545 is an apocalyptic number.

It is an amenable number.

51445205545 is a deficient number, since it is larger than the sum of its proper divisors (13037856215).

51445205545 is a wasteful number, since it uses less digits than its factorization.

51445205545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3444744.

The product of its (nonzero) digits is 400000, while the sum is 40.

The spelling of 51445205545 in words is "fifty-one billion, four hundred forty-five million, two hundred five thousand, five hundred forty-five".