5151065506561 has 4 divisors (see below), whose sum is σ = 5547301314772. Its totient is φ = 4754829698352.

The previous prime is 5151065506523. The next prime is 5151065506567. The reversal of 5151065506561 is 1656055601515.

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 983506574961 + 4167558931600 = 991719^2 + 2041460^2 .

It is a cyclic number.

It is not a de Polignac number, because 5151065506561 - 2³⁹ = 4601309692673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5151065506567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 198117904086 + ... + 198117904111.

It is an arithmetic number, because the mean of its divisors is an integer number (1386825328693).

Almost surely, 2^{5151065506561} is an apocalyptic number.

It is an amenable number.

5151065506561 is a deficient number, since it is larger than the sum of its proper divisors (396235808211).

5151065506561 is a wasteful number, since it uses less digits than its factorization.

5151065506561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396235808210.

The product of its (nonzero) digits is 675000, while the sum is 46.

The spelling of 5151065506561 in words is "five trillion, one hundred fifty-one billion, sixty-five million, five hundred six thousand, five hundred sixty-one".