550661895 has 80 divisors (see below), whose sum is σ = 1187619840. Its totient is φ = 238458816.

The previous prime is 550661879. The next prime is 550661921. The reversal of 550661895 is 598166055.

It is a happy number.

550661895 is a `hidden beast` number, since 5 + 506 + 61 + 89 + 5 = 666.

It is not a de Polignac number, because 550661895 - 2⁴ = 550661879 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 550661895.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 48754 + ... + 58976.

It is an arithmetic number, because the mean of its divisors is an integer number (14845248).

Almost surely, 2^550661895 is an apocalyptic number.

550661895 is an abundant number, since it is smaller than the sum of its proper divisors (636957945).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

550661895 is a wasteful number, since it uses less digits than its factorization.

550661895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10266 (or 10257 counting only the distinct ones).

The product of its (nonzero) digits is 324000, while the sum is 45.

The square root of 550661895 is about 23466.1862048352. The cubic root of 550661895 is about 819.6498083298.

The spelling of 550661895 in words is "five hundred fifty million, six hundred sixty-one thousand, eight hundred ninety-five".