61945775 has 12 divisors (see below), whose sum is σ = 76916952. Its totient is φ = 49489440.

The previous prime is 61945771. The next prime is 61945777. The reversal of 61945775 is 57754916.

It is not a de Polignac number, because 61945775 - 2² = 61945771 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61945771) 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 11 ways as a sum of consecutive naturals, for example, 26192 + ... + 28458.

It is an arithmetic number, because the mean of its divisors is an integer number (6409746).

Almost surely, 2^61945775 is an apocalyptic number.

61945775 is a deficient number, since it is larger than the sum of its proper divisors (14971177).

61945775 is a wasteful number, since it uses less digits than its factorization.

61945775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3370 (or 3365 counting only the distinct ones).

The product of its digits is 264600, while the sum is 44.

The square root of 61945775 is about 7870.5638298663. The cubic root of 61945775 is about 395.6737420053.

The spelling of 61945775 in words is "sixty-one million, nine hundred forty-five thousand, seven hundred seventy-five".