1566420487800 has 768 divisors, whose sum is σ = 5896422604800. Its totient is φ = 336287846400.

The previous prime is 1566420487799. The next prime is 1566420487813. The reversal of 1566420487800 is 87840246651.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 1435765255 + ... + 1435766345.

It is an arithmetic number, because the mean of its divisors is an integer number (7677633600).

Almost surely, 2^{1566420487800} is an apocalyptic number.

1566420487800 is a gapful number since it is divisible by the number (10) 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 1566420487800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2948211302400).

1566420487800 is an abundant number, since it is smaller than the sum of its proper divisors (4330002117000).

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

1566420487800 is a wasteful number, since it uses less digits than its factorization.

1566420487800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1396 (or 1387 counting only the distinct ones).

The product of its (nonzero) digits is 2580480, while the sum is 51.

The spelling of 1566420487800 in words is "one trillion, five hundred sixty-six billion, four hundred twenty million, four hundred eighty-seven thousand, eight hundred".