611564025616 has 80 divisors (see below), whose sum is σ = 1273364017344. Its totient is φ = 283501596672.

The previous prime is 611564025607. The next prime is 611564025617. The reversal of 611564025616 is 616520465116.

It is not an unprimeable number, because it can be changed into a prime (611564025617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16402291 + ... + 16439533.

Almost surely, 2^611564025616 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 611564025616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (636682008672).

611564025616 is an abundant number, since it is smaller than the sum of its proper divisors (661799991728).

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

611564025616 is a wasteful number, since it uses less digits than its factorization.

611564025616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38168 (or 38162 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 43.

The spelling of 611564025616 in words is "six hundred eleven billion, five hundred sixty-four million, twenty-five thousand, six hundred sixteen".