61544244 has 24 divisors (see below), whose sum is σ = 146659968. Its totient is φ = 20078080.

The previous prime is 61544237. The next prime is 61544279. The reversal of 61544244 is 44244516.

It is a happy number.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53997 + ... + 55124.

It is an arithmetic number, because the mean of its divisors is an integer number (6110832).

Almost surely, 2^61544244 is an apocalyptic number.

It is an amenable number.

61544244 is an abundant number, since it is smaller than the sum of its proper divisors (85115724).

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

61544244 is a wasteful number, since it uses less digits than its factorization.

61544244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109175 (or 109173 counting only the distinct ones).

The product of its digits is 15360, while the sum is 30.

The square root of 61544244 is about 7845.0139579226. The cubic root of 61544244 is about 394.8169723007.

The spelling of 61544244 in words is "sixty-one million, five hundred forty-four thousand, two hundred forty-four".