61857685 has 16 divisors (see below), whose sum is σ = 75807360. Its totient is φ = 48444480.

The previous prime is 61857671. The next prime is 61857703. The reversal of 61857685 is 58675816.

It is not a de Polignac number, because 61857685 - 2¹³ = 61849493 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57331 + ... + 58399.

It is an arithmetic number, because the mean of its divisors is an integer number (4737960).

Almost surely, 2^61857685 is an apocalyptic number.

It is an amenable number.

61857685 is a deficient number, since it is larger than the sum of its proper divisors (13949675).

61857685 is a wasteful number, since it uses less digits than its factorization.

61857685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1308.

The product of its digits is 403200, while the sum is 46.

The square root of 61857685 is about 7864.9656706180. The cubic root of 61857685 is about 395.4860970594.

The spelling of 61857685 in words is "sixty-one million, eight hundred fifty-seven thousand, six hundred eighty-five".