611215616 has 72 divisors (see below), whose sum is σ = 1388971584. Its totient is φ = 265717760.

The previous prime is 611215609. The next prime is 611215643. The reversal of 611215616 is 616512116.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60050 + ... + 69486.

It is an arithmetic number, because the mean of its divisors is an integer number (19291272).

Almost surely, 2^611215616 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 611215616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (694485792).

611215616 is an abundant number, since it is smaller than the sum of its proper divisors (777755968).

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

611215616 is a wasteful number, since it uses less digits than its factorization.

611215616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9487 (or 9473 counting only the distinct ones).

The product of its digits is 2160, while the sum is 29.

The square root of 611215616 is about 24722.7752487458. The cubic root of 611215616 is about 848.6555983944.

The spelling of 611215616 in words is "six hundred eleven million, two hundred fifteen thousand, six hundred sixteen".