550991635 has 4 divisors (see below), whose sum is σ = 661189968. Its totient is φ = 440793304.

The previous prime is 550991603. The next prime is 550991681. The reversal of 550991635 is 536199055.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 550991635 - 2⁵ = 550991603 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 550991591 and 550991600.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55099159 + ... + 55099168.

It is an arithmetic number, because the mean of its divisors is an integer number (165297492).

Almost surely, 2^550991635 is an apocalyptic number.

550991635 is a deficient number, since it is larger than the sum of its proper divisors (110198333).

550991635 is a wasteful number, since it uses less digits than its factorization.

550991635 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110198332.

The product of its (nonzero) digits is 182250, while the sum is 43.

The square root of 550991635 is about 23473.2110074442. The cubic root of 550991635 is about 819.8133796013.

The spelling of 550991635 in words is "five hundred fifty million, nine hundred ninety-one thousand, six hundred thirty-five".