61797785 has 48 divisors (see below), whose sum is σ = 92025216. Its totient is φ = 39004416.

The previous prime is 61797767. The next prime is 61797817. The reversal of 61797785 is 58779716.

It is not a de Polignac number, because 61797785 - 2²⁰ = 60749209 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 (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 846509 + ... + 846581.

It is an arithmetic number, because the mean of its divisors is an integer number (1917192).

Almost surely, 2^61797785 is an apocalyptic number.

It is an amenable number.

61797785 is a deficient number, since it is larger than the sum of its proper divisors (30227431).

61797785 is a wasteful number, since it uses less digits than its factorization.

61797785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190 (or 171 counting only the distinct ones).

The product of its digits is 740880, while the sum is 50.

The square root of 61797785 is about 7861.1567215010. The cubic root of 61797785 is about 395.3583992750.

The spelling of 61797785 in words is "sixty-one million, seven hundred ninety-seven thousand, seven hundred eighty-five".