616542562566 has 192 divisors, whose sum is σ = 1557348249600. Its totient is φ = 172661787648.

The previous prime is 616542562543. The next prime is 616542562577. The reversal of 616542562566 is 665265245616.

It is a happy number.

616542562566 is a `hidden beast` number, since 6 + 1 + 6 + 5 + 4 + 2 + 5 + 625 + 6 + 6 = 666.

It is a congruent number.

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 95 ways as a sum of consecutive naturals, for example, 611042670 + ... + 611043678.

It is an arithmetic number, because the mean of its divisors is an integer number (8111188800).

Almost surely, 2^616542562566 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 616542562566, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (778674124800).

616542562566 is an abundant number, since it is smaller than the sum of its proper divisors (940805687034).

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

616542562566 is a wasteful number, since it uses less digits than its factorization.

616542562566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1563 (or 1560 counting only the distinct ones).

The product of its digits is 15552000, while the sum is 54.

The spelling of 616542562566 in words is "six hundred sixteen billion, five hundred forty-two million, five hundred sixty-two thousand, five hundred sixty-six".