4636891691 has 4 divisors (see below), whose sum is σ = 4637092152. Its totient is φ = 4636691232.

The previous prime is 4636891669. The next prime is 4636891703. The reversal of 4636891691 is 1961986364.

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 4636891691 - 2¹⁰ = 4636890667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4636891621) 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, 60206 + ... + 113571.

It is an arithmetic number, because the mean of its divisors is an integer number (1159273038).

Almost surely, 2^4636891691 is an apocalyptic number.

4636891691 is a deficient number, since it is larger than the sum of its proper divisors (200461).

4636891691 is a wasteful number, since it uses less digits than its factorization.

4636891691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200460.

The product of its digits is 1679616, while the sum is 53.

The square root of 4636891691 is about 68094.7258677205. The cubic root of 4636891691 is about 1667.5376587755.

The spelling of 4636891691 in words is "four billion, six hundred thirty-six million, eight hundred ninety-one thousand, six hundred ninety-one".