56021355312065 has 16 divisors (see below), whose sum is σ = 78978358259136. Its totient is φ = 37608742027200.

The previous prime is 56021355312019. The next prime is 56021355312071.

56021355312065 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 56021355312065 - 2¹² = 56021355307969 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 39175772231 + ... + 39175773660.

It is an arithmetic number, because the mean of its divisors is an integer number (4936147391196).

Almost surely, 2^{56021355312065} is an apocalyptic number.

56021355312065 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

56021355312065 is a deficient number, since it is larger than the sum of its proper divisors (22957002947071).

56021355312065 is a wasteful number, since it uses less digits than its factorization.

56021355312065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78351545920.

The product of its (nonzero) digits is 810000, while the sum is 44.

The spelling of 56021355312065 in words is "fifty-six trillion, twenty-one billion, three hundred fifty-five million, three hundred twelve thousand, sixty-five".