61285612289 has 8 divisors (see below), whose sum is σ = 70789798368. Its totient is φ = 52436887360.

The previous prime is 61285612273. The next prime is 61285612303. The reversal of 61285612289 is 98221658216.

It is a happy number.

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

It is not a de Polignac number, because 61285612289 - 2⁴ = 61285612273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61285612789) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 163865087 + ... + 163865460.

It is an arithmetic number, because the mean of its divisors is an integer number (8848724796).

Almost surely, 2^61285612289 is an apocalyptic number.

It is an amenable number.

61285612289 is a deficient number, since it is larger than the sum of its proper divisors (9504186079).

61285612289 is a wasteful number, since it uses less digits than its factorization.

61285612289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327730575.

The product of its digits is 829440, while the sum is 50.

The spelling of 61285612289 in words is "sixty-one billion, two hundred eighty-five million, six hundred twelve thousand, two hundred eighty-nine".