611587421568 has 128 divisors (see below), whose sum is σ = 1805626236000. Its totient is φ = 203795398656.

The previous prime is 611587421567. The next prime is 611587421579. The reversal of 611587421568 is 865124785116.

611587421568 is a `hidden beast` number, since 6 + 1 + 1 + 5 + 8 + 74 + 2 + 1 + 568 = 666.

It is a tau number, because it is divible by the number of its divisors (128).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (611587421563) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 11090448 + ... + 11145456.

Almost surely, 2^611587421568 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 611587421568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (902813118000).

611587421568 is an abundant number, since it is smaller than the sum of its proper divisors (1194038814432).

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

611587421568 is a wasteful number, since it uses less digits than its factorization.

611587421568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58249 (or 58231 counting only the distinct ones).

The product of its digits is 3225600, while the sum is 54.

The spelling of 611587421568 in words is "six hundred eleven billion, five hundred eighty-seven million, four hundred twenty-one thousand, five hundred sixty-eight".