5661479640 has 64 divisors (see below), whose sum is σ = 16994181600. Its totient is φ = 1508861952.

The previous prime is 5661479617. The next prime is 5661479641. The reversal of 5661479640 is 469741665.

It is a self number, because there is not a number n which added to its sum of digits gives 5661479640.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5661479641) 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, 212166 + ... + 237354.

Almost surely, 2^5661479640 is an apocalyptic number.

It is an amenable number.

5661479640 is an abundant number, since it is smaller than the sum of its proper divisors (11332701960).

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

5661479640 is a wasteful number, since it uses less digits than its factorization.

5661479640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27076 (or 27072 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 48.

The square root of 5661479640 is about 75242.8045729291. The cubic root of 5661479640 is about 1782.2829395510.

The spelling of 5661479640 in words is "five billion, six hundred sixty-one million, four hundred seventy-nine thousand, six hundred forty".