61728734095 has 16 divisors (see below), whose sum is σ = 84722287680. Its totient is φ = 42295405824.

The previous prime is 61728734083. The next prime is 61728734167. The reversal of 61728734095 is 59043782716.

It is not a de Polignac number, because 61728734095 - 2⁷ = 61728733967 is a prime.

It is a super-2 number, since 2×61728734095² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 639012 + ... + 729241.

It is an arithmetic number, because the mean of its divisors is an integer number (5295142980).

It is a 2-persistent number, because it is pandigital, and so is 2⋅61728734095 = 123457468190, but 3⋅61728734095 = 185186202285 is not.

Almost surely, 2^61728734095 is an apocalyptic number.

61728734095 is a deficient number, since it is larger than the sum of its proper divisors (22993553585).

61728734095 is a wasteful number, since it uses less digits than its factorization.

61728734095 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1369554.

The product of its (nonzero) digits is 2540160, while the sum is 52.

The spelling of 61728734095 in words is "sixty-one billion, seven hundred twenty-eight million, seven hundred thirty-four thousand, ninety-five".