5491860640 has 96 divisors (see below), whose sum is σ = 14981186304. Its totient is φ = 1863475200.

The previous prime is 5491860599. The next prime is 5491860641. The reversal of 5491860640 is 460681945.

It is not an unprimeable number, because it can be changed into a prime (5491860641) 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, 83365 + ... + 133915.

It is an arithmetic number, because the mean of its divisors is an integer number (156054024).

Almost surely, 2^5491860640 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5491860640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7490593152).

5491860640 is an abundant number, since it is smaller than the sum of its proper divisors (9489325664).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

5491860640 is a wasteful number, since it uses less digits than its factorization.

5491860640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50670 (or 50662 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 43.

The square root of 5491860640 is about 74107.0889996362. The cubic root of 5491860640 is about 1764.3029869842.

The spelling of 5491860640 in words is "five billion, four hundred ninety-one million, eight hundred sixty thousand, six hundred forty".