55421380163 has 4 divisors (see below), whose sum is σ = 55421851200. Its totient is φ = 55420909128.

The previous prime is 55421380151. The next prime is 55421380169. The reversal of 55421380163 is 36108312455.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 55421380163 - 2¹² = 55421376067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55421380169) 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, 107438 + ... + 349836.

It is an arithmetic number, because the mean of its divisors is an integer number (13855462800).

Almost surely, 2^55421380163 is an apocalyptic number.

55421380163 is a deficient number, since it is larger than the sum of its proper divisors (471037).

55421380163 is a wasteful number, since it uses less digits than its factorization.

55421380163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 471036.

The product of its (nonzero) digits is 86400, while the sum is 38.

The spelling of 55421380163 in words is "fifty-five billion, four hundred twenty-one million, three hundred eighty thousand, one hundred sixty-three".