51027752656665 has 24 divisors (see below), whose sum is σ = 89011468340808. Its totient is φ = 27041458728960.

The previous prime is 51027752656651. The next prime is 51027752656667. The reversal of 51027752656665 is 56665625772015.

It can be written as a sum of positive squares in 4 ways, for example, as 54963989136 + 50972788667529 = 234444^2 + 7139523^2 .

It is not a de Polignac number, because 51027752656665 - 2⁴³ = 42231659634457 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51027752656667) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3611298856 + ... + 3611312985.

It is an arithmetic number, because the mean of its divisors is an integer number (3708811180867).

Almost surely, 2^{51027752656665} is an apocalyptic number.

It is an amenable number.

51027752656665 is a deficient number, since it is larger than the sum of its proper divisors (37983715684143).

51027752656665 is a wasteful number, since it uses less digits than its factorization.

51027752656665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7222612009 (or 7222612006 counting only the distinct ones).

The product of its (nonzero) digits is 158760000, while the sum is 63.

The spelling of 51027752656665 in words is "fifty-one trillion, twenty-seven billion, seven hundred fifty-two million, six hundred fifty-six thousand, six hundred sixty-five".