61015685 has 4 divisors (see below), whose sum is σ = 73218828. Its totient is φ = 48812544.

The previous prime is 61015673. The next prime is 61015687. The reversal of 61015685 is 58651016.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 28912129 + 32103556 = 5377^2 + 5666^2 .

It is a cyclic number.

It is not a de Polignac number, because 61015685 - 2⁸ = 61015429 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 (61015687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6101564 + ... + 6101573.

It is an arithmetic number, because the mean of its divisors is an integer number (18304707).

Almost surely, 2^61015685 is an apocalyptic number.

It is an amenable number.

61015685 is a deficient number, since it is larger than the sum of its proper divisors (12203143).

61015685 is a wasteful number, since it uses less digits than its factorization.

61015685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12203142.

The product of its (nonzero) digits is 7200, while the sum is 32.

The square root of 61015685 is about 7811.2537405976. The cubic root of 61015685 is about 393.6834552867.

The spelling of 61015685 in words is "sixty-one million, fifteen thousand, six hundred eighty-five".