61905018 has 32 divisors (see below), whose sum is σ = 143095680. Its totient is φ = 17487360.

The previous prime is 61905001. The next prime is 61905061. The reversal of 61905018 is 81050916.

It is a happy number.

61905018 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 in 15 ways as a sum of consecutive naturals, for example, 4543 + ... + 12018.

It is an arithmetic number, because the mean of its divisors is an integer number (4471740).

Almost surely, 2^61905018 is an apocalyptic number.

61905018 is an abundant number, since it is smaller than the sum of its proper divisors (81190662).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61905018 is a wasteful number, since it uses less digits than its factorization.

61905018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16662.

The product of its (nonzero) digits is 2160, while the sum is 30.

The square root of 61905018 is about 7867.9741992460. The cubic root of 61905018 is about 395.5869455946.

The spelling of 61905018 in words is "sixty-one million, nine hundred five thousand, eighteen".