56070558173221 has 4 divisors (see below), whose sum is σ = 56091853488492. Its totient is φ = 56049262857952.

The previous prime is 56070558173191. The next prime is 56070558173237. The reversal of 56070558173221 is 12237185507065.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18508184868996 + 37562373304225 = 4302114^2 + 6128815^2 .

It is a cyclic number.

It is not a de Polignac number, because 56070558173221 - 2¹³ = 56070558165029 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 (56070558179221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10647653686 + ... + 10647658951.

It is an arithmetic number, because the mean of its divisors is an integer number (14022963372123).

Almost surely, 2^{56070558173221} is an apocalyptic number.

It is an amenable number.

56070558173221 is a deficient number, since it is larger than the sum of its proper divisors (21295315271).

56070558173221 is a wasteful number, since it uses less digits than its factorization.

56070558173221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21295315270.

The product of its (nonzero) digits is 3528000, while the sum is 52.

The spelling of 56070558173221 in words is "fifty-six trillion, seventy billion, five hundred fifty-eight million, one hundred seventy-three thousand, two hundred twenty-one".