61715365073 has 8 divisors (see below), whose sum is σ = 64108399080. Its totient is φ = 59339992320.

The previous prime is 61715365057. The next prime is 61715365097. The reversal of 61715365073 is 37056351716.

It can be written as a sum of positive squares in 4 ways, for example, as 28360917649 + 33354447424 = 168407^2 + 182632^2 .

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 61715365073 - 2⁴ = 61715365057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61715365573) 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, 4408190 + ... + 4422167.

It is an arithmetic number, because the mean of its divisors is an integer number (8013549885).

Almost surely, 2^61715365073 is an apocalyptic number.

It is an amenable number.

61715365073 is a deficient number, since it is larger than the sum of its proper divisors (2393034007).

61715365073 is a wasteful number, since it uses less digits than its factorization.

61715365073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8830627.

The product of its (nonzero) digits is 396900, while the sum is 44.

The spelling of 61715365073 in words is "sixty-one billion, seven hundred fifteen million, three hundred sixty-five thousand, seventy-three".