5665542217920 has 448 divisors, whose sum is σ = 21539951677440. Its totient is φ = 1393575653376.

The previous prime is 5665542217919. The next prime is 5665542217921. The reversal of 5665542217920 is 297122455665.

5665542217920 is a `hidden beast` number, since 5 + 6 + 6 + 5 + 542 + 2 + 1 + 7 + 92 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (5665542217919) and next prime (5665542217921).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (5665542217921) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 159813637 + ... + 159849083.

It is an arithmetic number, because the mean of its divisors is an integer number (48080249280).

Almost surely, 2^{5665542217920} 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 5665542217920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10769975838720).

5665542217920 is an abundant number, since it is smaller than the sum of its proper divisors (15874409459520).

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

5665542217920 is a wasteful number, since it uses less digits than its factorization.

5665542217920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36909 (or 36893 counting only the distinct ones).

The product of its (nonzero) digits is 9072000, while the sum is 54.

The spelling of 5665542217920 in words is "five trillion, six hundred sixty-five billion, five hundred forty-two million, two hundred seventeen thousand, nine hundred twenty".