61561152 has 42 divisors (see below), whose sum is σ = 176455578. Its totient is φ = 20520192.

The previous prime is 61561151. The next prime is 61561169. The reversal of 61561152 is 25116516.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 56791296 + 4769856 = 7536^2 + 2184^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61561151) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 52863 + ... + 54014.

Almost surely, 2^61561152 is an apocalyptic number.

It is an amenable number.

61561152 is an abundant number, since it is smaller than the sum of its proper divisors (114894426).

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

61561152 is a wasteful number, since it uses less digits than its factorization.

61561152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106895 (or 106882 counting only the distinct ones).

The product of its digits is 1800, while the sum is 27.

The square root of 61561152 is about 7846.0915110646. The cubic root of 61561152 is about 394.8531249052.

Adding to 61561152 its reverse (25116516), we get a palindrome (86677668).

The spelling of 61561152 in words is "sixty-one million, five hundred sixty-one thousand, one hundred fifty-two".