5661544540 has 48 divisors (see below), whose sum is σ = 12168001440. Its totient is φ = 2212136960.

The previous prime is 5661544523. The next prime is 5661544541. The reversal of 5661544540 is 454451665.

It is a junction number, because it is equal to n+sod(n) for n = 5661544493 and 5661544502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5661544541) 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, 128580 + ... + 166900.

It is an arithmetic number, because the mean of its divisors is an integer number (253500030).

Almost surely, 2^5661544540 is an apocalyptic number.

It is an amenable number.

5661544540 is an abundant number, since it is smaller than the sum of its proper divisors (6506456900).

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

5661544540 is a wasteful number, since it uses less digits than its factorization.

5661544540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38502 (or 38500 counting only the distinct ones).

The product of its (nonzero) digits is 288000, while the sum is 40.

The square root of 5661544540 is about 75243.2358421672. The cubic root of 5661544540 is about 1782.2897498861.

The spelling of 5661544540 in words is "five billion, six hundred sixty-one million, five hundred forty-four thousand, five hundred forty".