61945790 has 32 divisors (see below), whose sum is σ = 119180160. Its totient is φ = 23099904.

The previous prime is 61945789. The next prime is 61945799. The reversal of 61945790 is 9754916.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61945799) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16859 + ... + 20201.

It is an arithmetic number, because the mean of its divisors is an integer number (3724380).

Almost surely, 2^61945790 is an apocalyptic number.

61945790 is a deficient number, since it is larger than the sum of its proper divisors (57234370).

61945790 is a wasteful number, since it uses less digits than its factorization.

61945790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3476.

The product of its (nonzero) digits is 68040, while the sum is 41.

The square root of 61945790 is about 7870.5647827840. The cubic root of 61945790 is about 395.6737739424.

The spelling of 61945790 in words is "sixty-one million, nine hundred forty-five thousand, seven hundred ninety".