550913691 has 16 divisors (see below), whose sum is σ = 742982688. Its totient is φ = 363072000.

The previous prime is 550913677. The next prime is 550913717. The reversal of 550913691 is 196319055.

It is not a de Polignac number, because 550913691 - 2⁵ = 550913659 is a prime.

It is not an unprimeable number, because it can be changed into a prime (550913191) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 295101 + ... + 296961.

It is an arithmetic number, because the mean of its divisors is an integer number (46436418).

Almost surely, 2^550913691 is an apocalyptic number.

550913691 is a deficient number, since it is larger than the sum of its proper divisors (192068997).

550913691 is a wasteful number, since it uses less digits than its factorization.

550913691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2942.

The product of its (nonzero) digits is 36450, while the sum is 39.

The square root of 550913691 is about 23471.5506731021. The cubic root of 550913691 is about 819.7747204860.

The spelling of 550913691 in words is "five hundred fifty million, nine hundred thirteen thousand, six hundred ninety-one".