52628306746221 has 12 divisors (see below), whose sum is σ = 76244239978972. Its totient is φ = 34981426440576.

The previous prime is 52628306746189. The next prime is 52628306746313. The reversal of 52628306746221 is 12264760382625.

52628306746221 is a `hidden beast` number, since 5 + 2 + 6 + 2 + 8 + 3 + 0 + 6 + 7 + 4 + 622 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 14738988261321 + 37889318484900 = 3839139^2 + 6155430^2 .

It is not a de Polignac number, because 52628306746221 - 2⁵ = 52628306746189 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 (52628306741221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8675945986 + ... + 8675952051.

Almost surely, 2^{52628306746221} is an apocalyptic number.

It is an amenable number.

52628306746221 is a deficient number, since it is larger than the sum of its proper divisors (23615933232751).

52628306746221 is a wasteful number, since it uses less digits than its factorization.

52628306746221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17351898380 (or 17351898377 counting only the distinct ones).

The product of its (nonzero) digits is 11612160, while the sum is 54.

The spelling of 52628306746221 in words is "fifty-two trillion, six hundred twenty-eight billion, three hundred six million, seven hundred forty-six thousand, two hundred twenty-one".