61561548 has 36 divisors (see below), whose sum is σ = 160982640. Its totient is φ = 19812576.

The previous prime is 61561529. The next prime is 61561561. The reversal of 61561548 is 84516516.

61561548 is a `hidden beast` number, since 61 + 56 + 1 + 548 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28440 + ... + 30527.

It is an arithmetic number, because the mean of its divisors is an integer number (4471740).

Almost surely, 2^61561548 is an apocalyptic number.

It is an amenable number.

61561548 is an abundant number, since it is smaller than the sum of its proper divisors (99421092).

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

61561548 is a wasteful number, since it uses less digits than its factorization.

61561548 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59006 (or 59001 counting only the distinct ones).

The product of its digits is 28800, while the sum is 36.

The square root of 61561548 is about 7846.1167465186. The cubic root of 61561548 is about 394.8539715512.

The spelling of 61561548 in words is "sixty-one million, five hundred sixty-one thousand, five hundred forty-eight".