61579985 has 8 divisors (see below), whose sum is σ = 73939176. Its totient is φ = 49235200.

The previous prime is 61579957. The next prime is 61579997. The reversal of 61579985 is 58997516.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 5973136 + 55606849 = 2444^2 + 7457^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 61579985 - 2¹⁰ = 61578961 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11807 + ... + 16203.

It is an arithmetic number, because the mean of its divisors is an integer number (9242397).

Almost surely, 2^61579985 is an apocalyptic number.

It is an amenable number.

61579985 is a deficient number, since it is larger than the sum of its proper divisors (12359191).

61579985 is a wasteful number, since it uses less digits than its factorization.

61579985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7203.

The product of its digits is 680400, while the sum is 50.

The square root of 61579985 is about 7847.2915709817. The cubic root of 61579985 is about 394.8933857433.

The spelling of 61579985 in words is "sixty-one million, five hundred seventy-nine thousand, nine hundred eighty-five".