61273720113 has 8 divisors (see below), whose sum is σ = 81701492928. Its totient is φ = 40847547024.

The previous prime is 61273720087. The next prime is 61273720159. The reversal of 61273720113 is 31102737216.

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

It is not a de Polignac number, because 61273720113 - 2¹² = 61273716017 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (61273720213) 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, 307506 + ... + 465947.

It is an arithmetic number, because the mean of its divisors is an integer number (10212686616).

Almost surely, 2^61273720113 is an apocalyptic number.

It is an amenable number.

61273720113 is a deficient number, since it is larger than the sum of its proper divisors (20427772815).

61273720113 is a wasteful number, since it uses less digits than its factorization.

61273720113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 799863.

The product of its (nonzero) digits is 10584, while the sum is 33.

The spelling of 61273720113 in words is "sixty-one billion, two hundred seventy-three million, seven hundred twenty thousand, one hundred thirteen".