61595520 has 128 divisors (see below), whose sum is σ = 224432640. Its totient is φ = 14075904.

The previous prime is 61595497. The next prime is 61595533. The reversal of 61595520 is 2559516.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11149 + ... + 15731.

It is an arithmetic number, because the mean of its divisors is an integer number (1753380).

Almost surely, 2^61595520 is an apocalyptic number.

61595520 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61595520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (112216320).

61595520 is an abundant number, since it is smaller than the sum of its proper divisors (162837120).

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

61595520 is a wasteful number, since it uses less digits than its factorization.

61595520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4612 (or 4600 counting only the distinct ones).

The product of its (nonzero) digits is 13500, while the sum is 33.

The square root of 61595520 is about 7848.2813405229. The cubic root of 61595520 is about 394.9265900003.

The spelling of 61595520 in words is "sixty-one million, five hundred ninety-five thousand, five hundred twenty".