55135452565321 has 4 divisors (see below), whose sum is σ = 55136501997444. Its totient is φ = 55134403133200.

The previous prime is 55135452565309. The next prime is 55135452565363. The reversal of 55135452565321 is 12356525453155.

It is a happy number.

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 48017970250000 + 7117482315321 = 6929500^2 + 2667861^2 .

It is a cyclic number.

It is not a de Polignac number, because 55135452565321 - 2¹¹ = 55135452563273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55135452365321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 524637250 + ... + 524742331.

It is an arithmetic number, because the mean of its divisors is an integer number (13784125499361).

Almost surely, 2^{55135452565321} is an apocalyptic number.

It is an amenable number.

55135452565321 is a deficient number, since it is larger than the sum of its proper divisors (1049432123).

55135452565321 is a wasteful number, since it uses less digits than its factorization.

55135452565321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1049432122.

The product of its digits is 13500000, while the sum is 52.

The spelling of 55135452565321 in words is "fifty-five trillion, one hundred thirty-five billion, four hundred fifty-two million, five hundred sixty-five thousand, three hundred twenty-one".