550778477 has 4 divisors (see below), whose sum is σ = 562497216. Its totient is φ = 539059740.

The previous prime is 550778413. The next prime is 550778521. The reversal of 550778477 is 774877055.

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 550778477 - 2⁶ = 550778413 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 (550778407) 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, 5859299 + ... + 5859392.

It is an arithmetic number, because the mean of its divisors is an integer number (140624304).

Almost surely, 2^550778477 is an apocalyptic number.

It is an amenable number.

550778477 is a deficient number, since it is larger than the sum of its proper divisors (11718739).

550778477 is a wasteful number, since it uses less digits than its factorization.

550778477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11718738.

The product of its (nonzero) digits is 1920800, while the sum is 50.

The square root of 550778477 is about 23468.6701157096. The cubic root of 550778477 is about 819.7076476150.

The spelling of 550778477 in words is "five hundred fifty million, seven hundred seventy-eight thousand, four hundred seventy-seven".