61157685 has 32 divisors (see below), whose sum is σ = 100707840. Its totient is φ = 31680000.

The previous prime is 61157641. The next prime is 61157693. The reversal of 61157685 is 58675116.

61157685 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 61157685 - 2⁷ = 61157557 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 81060 + ... + 81810.

It is an arithmetic number, because the mean of its divisors is an integer number (3147120).

Almost surely, 2^61157685 is an apocalyptic number.

It is an amenable number.

61157685 is a deficient number, since it is larger than the sum of its proper divisors (39550155).

61157685 is a wasteful number, since it uses less digits than its factorization.

61157685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 909.

The product of its digits is 50400, while the sum is 39.

The square root of 61157685 is about 7820.3379083004. The cubic root of 61157685 is about 393.9886212970.

The spelling of 61157685 in words is "sixty-one million, one hundred fifty-seven thousand, six hundred eighty-five".