61561546 has 8 divisors (see below), whose sum is σ = 92395044. Its totient is φ = 30763200.

The previous prime is 61561529. The next prime is 61561561. The reversal of 61561546 is 64516516.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 60668521 + 893025 = 7789^2 + 945^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3855 + ... + 11746.

Almost surely, 2^61561546 is an apocalyptic number.

61561546 is a deficient number, since it is larger than the sum of its proper divisors (30833498).

61561546 is a wasteful number, since it uses less digits than its factorization.

61561546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17576.

The product of its digits is 21600, while the sum is 34.

The square root of 61561546 is about 7846.1166190670. The cubic root of 61561546 is about 394.8539672752.

The spelling of 61561546 in words is "sixty-one million, five hundred sixty-one thousand, five hundred forty-six".