61518406 has 8 divisors (see below), whose sum is σ = 93445920. Its totient is φ = 30369768.

The previous prime is 61518403. The next prime is 61518407. The reversal of 61518406 is 60481516.

61518406 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61518403) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 194521 + ... + 194836.

It is an arithmetic number, because the mean of its divisors is an integer number (11680740).

Almost surely, 2^61518406 is an apocalyptic number.

61518406 is a deficient number, since it is larger than the sum of its proper divisors (31927514).

61518406 is a wasteful number, since it uses less digits than its factorization.

61518406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389438.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 61518406 is about 7843.3670065859. The cubic root of 61518406 is about 394.7617128202.

The spelling of 61518406 in words is "sixty-one million, five hundred eighteen thousand, four hundred six".