61544245 has 12 divisors (see below), whose sum is σ = 85911084. Its totient is φ = 42201600.

The previous prime is 61544237. The next prime is 61544279. The reversal of 61544245 is 54244516.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 25472209 + 36072036 = 5047^2 + 6006^2 .

It is not a de Polignac number, because 61544245 - 2³ = 61544237 is a prime.

It is a congruent number.

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, 125356 + ... + 125845.

It is an arithmetic number, because the mean of its divisors is an integer number (7159257).

Almost surely, 2^61544245 is an apocalyptic number.

It is an amenable number.

61544245 is a deficient number, since it is larger than the sum of its proper divisors (24366839).

61544245 is a wasteful number, since it uses less digits than its factorization.

61544245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251220 (or 251213 counting only the distinct ones).

The product of its digits is 19200, while the sum is 31.

The square root of 61544245 is about 7845.0140216573. The cubic root of 61544245 is about 394.8169744391.

The spelling of 61544245 in words is "sixty-one million, five hundred forty-four thousand, two hundred forty-five".