51564667522555 has 8 divisors (see below), whose sum is σ = 67502837484144. Its totient is φ = 37501576380000.

The previous prime is 51564667522519. The next prime is 51564667522559. The reversal of 51564667522555 is 55522576646515.

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

It is not a de Polignac number, because 51564667522555 - 2¹⁹ = 51564666998267 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51564667522559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 468769704696 + ... + 468769704805.

It is an arithmetic number, because the mean of its divisors is an integer number (8437854685518).

Almost surely, 2^{51564667522555} is an apocalyptic number.

51564667522555 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

51564667522555 is a deficient number, since it is larger than the sum of its proper divisors (15938169961589).

51564667522555 is a wasteful number, since it uses less digits than its factorization.

51564667522555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 937539409517.

The product of its digits is 378000000, while the sum is 64.

The spelling of 51564667522555 in words is "fifty-one trillion, five hundred sixty-four billion, six hundred sixty-seven million, five hundred twenty-two thousand, five hundred fifty-five".