61705062550221 has 8 divisors (see below), whose sum is σ = 82364126127264. Its totient is φ = 41091353670000.

The previous prime is 61705062550169. The next prime is 61705062550223. The reversal of 61705062550221 is 12205526050716.

61705062550221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a de Polignac number, because none of the positive numbers 2^k-61705062550221 is a prime.

It is a super-3 number, since 3×61705062550221³ (a number of 42 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61705062550223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11338671030 + ... + 11338676471.

It is an arithmetic number, because the mean of its divisors is an integer number (10295515765908).

Almost surely, 2^{61705062550221} is an apocalyptic number.

It is an amenable number.

61705062550221 is a deficient number, since it is larger than the sum of its proper divisors (20659063577043).

61705062550221 is a wasteful number, since it uses less digits than its factorization.

61705062550221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22677348411.

The product of its (nonzero) digits is 252000, while the sum is 42.

The spelling of 61705062550221 in words is "sixty-one trillion, seven hundred five billion, sixty-two million, five hundred fifty thousand, two hundred twenty-one".