51445232145 has 12 divisors (see below), whose sum is σ = 89171735796. Its totient is φ = 27437457120.

The previous prime is 51445232131. The next prime is 51445232171. The reversal of 51445232145 is 54123254415.

51445232145 is a `hidden beast` number, since 51 + 44 + 523 + 2 + 1 + 45 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 19608680961 + 31836551184 = 140031^2 + 178428^2 .

It is not a de Polignac number, because 51445232145 - 2¹⁰ = 51445231121 is a prime.

It is a super-2 number, since 2×51445232145² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 571613646 + ... + 571613735.

It is an arithmetic number, because the mean of its divisors is an integer number (7430977983).

Almost surely, 2^51445232145 is an apocalyptic number.

It is an amenable number.

51445232145 is a deficient number, since it is larger than the sum of its proper divisors (37726503651).

51445232145 is a wasteful number, since it uses less digits than its factorization.

51445232145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1143227392 (or 1143227389 counting only the distinct ones).

The product of its digits is 96000, while the sum is 36.

The spelling of 51445232145 in words is "fifty-one billion, four hundred forty-five million, two hundred thirty-two thousand, one hundred forty-five".