61518616 has 8 divisors (see below), whose sum is σ = 115347420. Its totient is φ = 30759304.

The previous prime is 61518607. The next prime is 61518623. The reversal of 61518616 is 61681516.

61518616 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×61518616² = 7569080229110912, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3844906 + ... + 3844921.

Almost surely, 2^61518616 is an apocalyptic number.

It is an amenable number.

61518616 is a deficient number, since it is larger than the sum of its proper divisors (53828804).

61518616 is a wasteful number, since it uses less digits than its factorization.

61518616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7689833 (or 7689829 counting only the distinct ones).

The product of its digits is 8640, while the sum is 34.

The square root of 61518616 is about 7843.3803936823. The cubic root of 61518616 is about 394.7621620075.

The spelling of 61518616 in words is "sixty-one million, five hundred eighteen thousand, six hundred sixteen".