611601564 has 96 divisors (see below), whose sum is σ = 1763345920. Its totient is φ = 161056512.

The previous prime is 611601563. The next prime is 611601569. The reversal of 611601564 is 465106116.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (611601563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 53874 + ... + 64230.

Almost surely, 2^611601564 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 611601564, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (881672960).

611601564 is an abundant number, since it is smaller than the sum of its proper divisors (1151744356).

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

611601564 is a wasteful number, since it uses less digits than its factorization.

611601564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10427 (or 10425 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 611601564 is about 24730.5795322309. The cubic root of 611601564 is about 848.8341867715.

The spelling of 611601564 in words is "six hundred eleven million, six hundred one thousand, five hundred sixty-four".