51474482870065 has 4 divisors (see below), whose sum is σ = 61769379444084. Its totient is φ = 41179586296048.

The previous prime is 51474482870029. The next prime is 51474482870081. The reversal of 51474482870065 is 56007828447415.

It is a happy number.

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 17151558405136 + 34322924464929 = 4141444^2 + 5858577^2 .

It is a cyclic number.

It is not a de Polignac number, because 51474482870065 - 2⁴⁵ = 16290110781233 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51474482869985 and 51474482870012.

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, 5147448287002 + ... + 5147448287011.

It is an arithmetic number, because the mean of its divisors is an integer number (15442344861021).

Almost surely, 2^{51474482870065} is an apocalyptic number.

It is an amenable number.

51474482870065 is a deficient number, since it is larger than the sum of its proper divisors (10294896574019).

51474482870065 is a wasteful number, since it uses less digits than its factorization.

51474482870065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10294896574018.

The product of its (nonzero) digits is 60211200, while the sum is 61.

The spelling of 51474482870065 in words is "fifty-one trillion, four hundred seventy-four billion, four hundred eighty-two million, eight hundred seventy thousand, sixty-five".