5640637511 has 8 divisors (see below), whose sum is σ = 5721579360. Its totient is φ = 5559795072.

The previous prime is 5640637481. The next prime is 5640637517. The reversal of 5640637511 is 1157360465.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 5640637511 - 2¹⁰ = 5640636487 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5640637517) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93446 + ... + 141468.

It is an arithmetic number, because the mean of its divisors is an integer number (715197420).

Almost surely, 2^5640637511 is an apocalyptic number.

5640637511 is a deficient number, since it is larger than the sum of its proper divisors (80941849).

5640637511 is a wasteful number, since it uses less digits than its factorization.

5640637511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49705.

The product of its (nonzero) digits is 75600, while the sum is 38.

The square root of 5640637511 is about 75104.1777200177. The cubic root of 5640637511 is about 1780.0931558156.

Adding to 5640637511 its reverse (1157360465), we get a palindrome (6797997976).

The spelling of 5640637511 in words is "five billion, six hundred forty million, six hundred thirty-seven thousand, five hundred eleven".