61057857 has 16 divisors (see below), whose sum is σ = 94317440. Its totient is φ = 34411392.

The previous prime is 61057853. The next prime is 61057859. The reversal of 61057857 is 75875016.

61057857 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 61057857 - 2² = 61057853 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61057853) by changing a digit.

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, 18382 + ... + 21447.

It is an arithmetic number, because the mean of its divisors is an integer number (5894840).

Almost surely, 2^61057857 is an apocalyptic number.

It is an amenable number.

61057857 is a deficient number, since it is larger than the sum of its proper divisors (33259583).

61057857 is a wasteful number, since it uses less digits than its factorization.

61057857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39912.

The product of its (nonzero) digits is 58800, while the sum is 39.

The square root of 61057857 is about 7813.9527129360. The cubic root of 61057857 is about 393.7741346759.

The spelling of 61057857 in words is "sixty-one million, fifty-seven thousand, eight hundred fifty-seven".