61544025 has 27 divisors (see below), whose sum is σ = 110443359. Its totient is φ = 32760720.

The previous prime is 61544011. The next prime is 61544027. The reversal of 61544025 is 52044516.

The square root of 61544025 is 7845.

It is a perfect power (a square), and thus also a powerful number.

61544025 is a `hidden beast` number, since 615 + 4 + 40 + 2 + 5 = 666.

It can be written as a sum of positive squares in only one way, i.e., 22155849 + 39388176 = 4707^2 + 6276^2 .

It is not a de Polignac number, because 61544025 - 2¹⁹ = 61019737 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 61544025.

It is not an unprimeable number, because it can be changed into a prime (61544027) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 117414 + ... + 117936.

Almost surely, 2^61544025 is an apocalyptic number.

61544025 is the 7845-th square number.

61544025 is the 3923-rd centered octagonal number.

It is an amenable number.

61544025 is a deficient number, since it is larger than the sum of its proper divisors (48899334).

61544025 is an equidigital number, since it uses as much as digits as its factorization.

61544025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1062 (or 531 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The cubic root of 61544025 is about 394.8165039925.

The spelling of 61544025 in words is "sixty-one million, five hundred forty-four thousand, twenty-five".