61918745 has 16 divisors (see below), whose sum is σ = 86116608. Its totient is φ = 41858880.

The previous prime is 61918729. The next prime is 61918751. The reversal of 61918745 is 54781916.

61918745 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 61918745 - 2⁴ = 61918729 is a prime.

It is a Duffinian 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 in 15 ways as a sum of consecutive naturals, for example, 9974 + ... + 14943.

It is an arithmetic number, because the mean of its divisors is an integer number (5382288).

Almost surely, 2^61918745 is an apocalyptic number.

It is an amenable number.

61918745 is a deficient number, since it is larger than the sum of its proper divisors (24197863).

61918745 is a wasteful number, since it uses less digits than its factorization.

61918745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25000.

The product of its digits is 60480, while the sum is 41.

The square root of 61918745 is about 7868.8464847143. The cubic root of 61918745 is about 395.6161829697.

The spelling of 61918745 in words is "sixty-one million, nine hundred eighteen thousand, seven hundred forty-five".