521860056748087 has 8 divisors (see below), whose sum is σ = 527011722221600. Its totient is φ = 516715008702624.

The previous prime is 521860056748061. The next prime is 521860056748091. The reversal of 521860056748087 is 780847650068125.

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 521860056748087 - 2²³ = 521860048359479 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521860056748057) 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, 1654198512 + ... + 1654513957.

It is an arithmetic number, because the mean of its divisors is an integer number (65876465277700).

Almost surely, 2^{521860056748087} is an apocalyptic number.

521860056748087 is a deficient number, since it is larger than the sum of its proper divisors (5151665473513).

521860056748087 is a wasteful number, since it uses less digits than its factorization.

521860056748087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3308714025.

The product of its (nonzero) digits is 180633600, while the sum is 67.

The spelling of 521860056748087 in words is "five hundred twenty-one trillion, eight hundred sixty billion, fifty-six million, seven hundred forty-eight thousand, eighty-seven".