61580321279 has 8 divisors (see below), whose sum is σ = 67639712640. Its totient is φ = 55802762136.

The previous prime is 61580321249. The next prime is 61580321293. The reversal of 61580321279 is 97212308516.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61580321279 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 (61580321249) 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, 70457597 + ... + 70458470.

It is an arithmetic number, because the mean of its divisors is an integer number (8454964080).

Almost surely, 2^61580321279 is an apocalyptic number.

61580321279 is a deficient number, since it is larger than the sum of its proper divisors (6059391361).

61580321279 is a wasteful number, since it uses less digits than its factorization.

61580321279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140916109.

The product of its (nonzero) digits is 181440, while the sum is 44.

The spelling of 61580321279 in words is "sixty-one billion, five hundred eighty million, three hundred twenty-one thousand, two hundred seventy-nine".