61555244 has 6 divisors (see below), whose sum is σ = 107721684. Its totient is φ = 30777620.

The previous prime is 61555237. The next prime is 61555253. The reversal of 61555244 is 44255516.

It is a self number, because there is not a number n which added to its sum of digits gives 61555244.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7694402 + ... + 7694409.

It is an arithmetic number, because the mean of its divisors is an integer number (17953614).

Almost surely, 2^61555244 is an apocalyptic number.

It is an amenable number.

61555244 is a deficient number, since it is larger than the sum of its proper divisors (46166440).

61555244 is a wasteful number, since it uses less digits than its factorization.

61555244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15388815 (or 15388813 counting only the distinct ones).

The product of its digits is 24000, while the sum is 32.

The square root of 61555244 is about 7845.7150088440. The cubic root of 61555244 is about 394.8404932004.

The spelling of 61555244 in words is "sixty-one million, five hundred fifty-five thousand, two hundred forty-four".