5040561991 has 4 divisors (see below), whose sum is σ = 5063165632. Its totient is φ = 5017958352.

The previous prime is 5040561971. The next prime is 5040562019. The reversal of 5040561991 is 1991650405.

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 5040561991 - 2¹¹ = 5040559943 is a prime.

It is a super-2 number, since 2×5040561991² = 50814530370227768162, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5040561971) 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, 11301486 + ... + 11301931.

It is an arithmetic number, because the mean of its divisors is an integer number (1265791408).

Almost surely, 2^5040561991 is an apocalyptic number.

5040561991 is a deficient number, since it is larger than the sum of its proper divisors (22603641).

5040561991 is a wasteful number, since it uses less digits than its factorization.

5040561991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22603640.

The product of its (nonzero) digits is 48600, while the sum is 40.

The square root of 5040561991 is about 70996.9153625705. The cubic root of 5040561991 is about 1714.5875007431.

The spelling of 5040561991 in words is "five billion, forty million, five hundred sixty-one thousand, nine hundred ninety-one".