61128564 has 48 divisors (see below), whose sum is σ = 163688448. Its totient is φ = 17392608.

The previous prime is 61128563. The next prime is 61128569. The reversal of 61128564 is 46582116.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61128563) 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, 20709 + ... + 23475.

It is an arithmetic number, because the mean of its divisors is an integer number (3410176).

Almost surely, 2^61128564 is an apocalyptic number.

It is an amenable number.

61128564 is an abundant number, since it is smaller than the sum of its proper divisors (102559884).

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

61128564 is a wasteful number, since it uses less digits than its factorization.

61128564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3044 (or 3042 counting only the distinct ones).

The product of its digits is 11520, while the sum is 33.

The square root of 61128564 is about 7818.4758105401. The cubic root of 61128564 is about 393.9260771584.

The spelling of 61128564 in words is "sixty-one million, one hundred twenty-eight thousand, five hundred sixty-four".