51605060565649 has 8 divisors (see below), whose sum is σ = 53863589221632. Its totient is φ = 49347767773920.

The previous prime is 51605060565613. The next prime is 51605060565671. The reversal of 51605060565649 is 94656506050615.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51605060565649 - 2⁹ = 51605060565137 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51605060565593 and 51605060565602.

It is not an unprimeable number, because it can be changed into a prime (51605060565679) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 308880724 + ... + 309047749.

It is an arithmetic number, because the mean of its divisors is an integer number (6732948652704).

Almost surely, 2^{51605060565649} is an apocalyptic number.

It is an amenable number.

51605060565649 is a deficient number, since it is larger than the sum of its proper divisors (2258528655983).

51605060565649 is a wasteful number, since it uses less digits than its factorization.

51605060565649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 617932127.

The product of its (nonzero) digits is 29160000, while the sum is 58.

The spelling of 51605060565649 in words is "fifty-one trillion, six hundred five billion, sixty million, five hundred sixty-five thousand, six hundred forty-nine".