550356615421 has 4 divisors (see below), whose sum is σ = 550381021344. Its totient is φ = 550332209500.

The previous prime is 550356615409. The next prime is 550356615443. The reversal of 550356615421 is 124516653055.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 550356615421 - 2¹⁹ = 550356091133 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 (550356615821) 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, 12169105 + ... + 12214246.

It is an arithmetic number, because the mean of its divisors is an integer number (137595255336).

Almost surely, 2^550356615421 is an apocalyptic number.

It is an amenable number.

550356615421 is a deficient number, since it is larger than the sum of its proper divisors (24405923).

550356615421 is a wasteful number, since it uses less digits than its factorization.

550356615421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24405922.

The product of its (nonzero) digits is 540000, while the sum is 43.

The spelling of 550356615421 in words is "five hundred fifty billion, three hundred fifty-six million, six hundred fifteen thousand, four hundred twenty-one".