61540744 has 16 divisors (see below), whose sum is σ = 115821900. Its totient is φ = 30654912.

The previous prime is 61540733. The next prime is 61540747. The reversal of 61540744 is 44704516.

It can be written as a sum of positive squares in 2 ways, for example, as 60996100 + 544644 = 7810^2 + 738^2 .

It is not an unprimeable number, because it can be changed into a prime (61540747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12147 + ... + 16450.

Almost surely, 2^61540744 is an apocalyptic number.

It is an amenable number.

61540744 is a deficient number, since it is larger than the sum of its proper divisors (54281156).

61540744 is a wasteful number, since it uses less digits than its factorization.

61540744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28872 (or 28868 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 31.

The square root of 61540744 is about 7844.7908831275. The cubic root of 61540744 is about 394.8094877903.

The spelling of 61540744 in words is "sixty-one million, five hundred forty thousand, seven hundred forty-four".