55285465037021 has 4 divisors (see below), whose sum is σ = 55285563386844. Its totient is φ = 55285366687200.

The previous prime is 55285465036981. The next prime is 55285465037029. The reversal of 55285465037021 is 12073056458255.

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 9110654044996 + 46174810992025 = 3018386^2 + 6795205^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55285465037021 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 (55285465037029) 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, 48326840 + ... + 49457601.

It is an arithmetic number, because the mean of its divisors is an integer number (13821390846711).

Almost surely, 2^{55285465037021} is an apocalyptic number.

It is an amenable number.

55285465037021 is a deficient number, since it is larger than the sum of its proper divisors (98349823).

55285465037021 is an equidigital number, since it uses as much as digits as its factorization.

55285465037021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98349822.

The product of its (nonzero) digits is 10080000, while the sum is 53.

The spelling of 55285465037021 in words is "fifty-five trillion, two hundred eighty-five billion, four hundred sixty-five million, thirty-seven thousand, twenty-one".