61611056 has 40 divisors (see below), whose sum is σ = 130502064. Its totient is φ = 28005120.

The previous prime is 61611049. The next prime is 61611059. The reversal of 61611056 is 65011616.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is not an unprimeable number, because it can be changed into a prime (61611059) by changing a digit.

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, 11726 + ... + 16146.

Almost surely, 2^61611056 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 61611056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65251032).

61611056 is an abundant number, since it is smaller than the sum of its proper divisors (68891008).

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

61611056 is a wasteful number, since it uses less digits than its factorization.

61611056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4509 (or 4503 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 61611056 is about 7849.2710489573. The cubic root of 61611056 is about 394.9597908117.

The spelling of 61611056 in words is "sixty-one million, six hundred eleven thousand, fifty-six".