51355306523655 has 32 divisors (see below), whose sum is σ = 91645464683520. Its totient is φ = 27285354220320.

The previous prime is 51355306523641. The next prime is 51355306523657. The reversal of 51355306523655 is 55632560355315.

51355306523655 is a `hidden beast` number, since 5 + 1 + 3 + 5 + 53 + 0 + 6 + 523 + 65 + 5 = 666.

It is not a de Polignac number, because 51355306523655 - 2¹⁰ = 51355306522631 is a prime.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51355306523657) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 723176811 + ... + 723247820.

It is an arithmetic number, because the mean of its divisors is an integer number (2863920771360).

Almost surely, 2^{51355306523655} is an apocalyptic number.

51355306523655 is a deficient number, since it is larger than the sum of its proper divisors (40290158159865).

51355306523655 is a wasteful number, since it uses less digits than its factorization.

51355306523655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1446424908 (or 1446424902 counting only the distinct ones).

The product of its (nonzero) digits is 30375000, while the sum is 54.

The spelling of 51355306523655 in words is "fifty-one trillion, three hundred fifty-five billion, three hundred six million, five hundred twenty-three thousand, six hundred fifty-five".