61581789079 has 8 divisors (see below), whose sum is σ = 62075939328. Its totient is φ = 61087783680.

The previous prime is 61581789053. The next prime is 61581789089. The reversal of 61581789079 is 97098718516.

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

It is a cyclic number.

It is not a de Polignac number, because 61581789079 - 2¹¹ = 61581787031 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 (61581789019) 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, 917679 + ... + 982495.

It is an arithmetic number, because the mean of its divisors is an integer number (7759492416).

Almost surely, 2^61581789079 is an apocalyptic number.

61581789079 is a deficient number, since it is larger than the sum of its proper divisors (494150249).

61581789079 is a wasteful number, since it uses less digits than its factorization.

61581789079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72425.

The product of its (nonzero) digits is 7620480, while the sum is 61.

The spelling of 61581789079 in words is "sixty-one billion, five hundred eighty-one million, seven hundred eighty-nine thousand, seventy-nine".