61615449 has 24 divisors (see below), whose sum is σ = 103883520. Its totient is φ = 34458048.

The previous prime is 61615439. The next prime is 61615451. The reversal of 61615449 is 94451616.

It is not a de Polignac number, because 61615449 - 2⁵ = 61615417 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61615439) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7444 + ... + 13365.

It is an arithmetic number, because the mean of its divisors is an integer number (4328480).

Almost surely, 2^61615449 is an apocalyptic number.

It is an amenable number.

61615449 is a deficient number, since it is larger than the sum of its proper divisors (42268071).

61615449 is a wasteful number, since it uses less digits than its factorization.

61615449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20869 (or 20866 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 61615449 is about 7849.5508788720. The cubic root of 61615449 is about 394.9691777477.

The spelling of 61615449 in words is "sixty-one million, six hundred fifteen thousand, four hundred forty-nine".