61567580 has 48 divisors (see below), whose sum is σ = 135203040. Its totient is φ = 23520000.

The previous prime is 61567577. The next prime is 61567589. The reversal of 61567580 is 8576516.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61567589) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58055 + ... + 59105.

It is an arithmetic number, because the mean of its divisors is an integer number (2816730).

Almost surely, 2^61567580 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 61567580, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67601520).

61567580 is an abundant number, since it is smaller than the sum of its proper divisors (73635460).

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

61567580 is a wasteful number, since it uses less digits than its factorization.

61567580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1190 (or 1188 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 38.

The square root of 61567580 is about 7846.5011310775. The cubic root of 61567580 is about 394.8668674873.

The spelling of 61567580 in words is "sixty-one million, five hundred sixty-seven thousand, five hundred eighty".