5540645644 has 12 divisors (see below), whose sum is σ = 10266490584. Its totient is φ = 2607362624.

The previous prime is 5540645641. The next prime is 5540645683. The reversal of 5540645644 is 4465460455.

It is a self number, because there is not a number n which added to its sum of digits gives 5540645644.

It is not an unprimeable number, because it can be changed into a prime (5540645641) 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, 40739974 + ... + 40740109.

It is an arithmetic number, because the mean of its divisors is an integer number (855540882).

Almost surely, 2^5540645644 is an apocalyptic number.

It is an amenable number.

5540645644 is a deficient number, since it is larger than the sum of its proper divisors (4725844940).

5540645644 is a wasteful number, since it uses less digits than its factorization.

5540645644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81480104 (or 81480102 counting only the distinct ones).

The product of its (nonzero) digits is 1152000, while the sum is 43.

The square root of 5540645644 is about 74435.5133252939. The cubic root of 5540645644 is about 1769.5117812504.

The spelling of 5540645644 in words is "five billion, five hundred forty million, six hundred forty-five thousand, six hundred forty-four".