5561644042500 has 1920 divisors, whose sum is σ = 21866600448000. Its totient is φ = 1067489280000.

The previous prime is 5561644042463. The next prime is 5561644042523. The reversal of 5561644042500 is 52404461655.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 639 ways as a sum of consecutive naturals, for example, 62490382456 + ... + 62490382544.

It is an arithmetic number, because the mean of its divisors is an integer number (11388854400).

Almost surely, 2^{5561644042500} is an apocalyptic number.

5561644042500 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5561644042500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10933300224000).

5561644042500 is an abundant number, since it is smaller than the sum of its proper divisors (16304956405500).

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

5561644042500 is a wasteful number, since it uses less digits than its factorization.

5561644042500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295 (or 278 counting only the distinct ones).

The product of its (nonzero) digits is 576000, while the sum is 42.

The spelling of 5561644042500 in words is "five trillion, five hundred sixty-one billion, six hundred forty-four million, forty-two thousand, five hundred".