61528656 has 80 divisors (see below), whose sum is σ = 183024000. Its totient is φ = 17447424.

The previous prime is 61528619. The next prime is 61528667. The reversal of 61528656 is 65682516.

61528656 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 49450 + ... + 50678.

It is an arithmetic number, because the mean of its divisors is an integer number (2287800).

Almost surely, 2^61528656 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 61528656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91512000).

61528656 is an abundant number, since it is smaller than the sum of its proper divisors (121495344).

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

61528656 is a wasteful number, since it uses less digits than its factorization.

61528656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1396 (or 1390 counting only the distinct ones).

The product of its digits is 86400, while the sum is 39.

The square root of 61528656 is about 7844.0203977297. The cubic root of 61528656 is about 394.7836362472.

The spelling of 61528656 in words is "sixty-one million, five hundred twenty-eight thousand, six hundred fifty-six".