75721054727653 has 8 divisors (see below), whose sum is σ = 76368044804760. Its totient is φ = 75075431051520.

The previous prime is 75721054727611. The next prime is 75721054727711. The reversal of 75721054727653 is 35672745012757.

It can be written as a sum of positive squares in 4 ways, for example, as 40076787568129 + 35644267159524 = 6330623^2 + 5970282^2 .

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 75721054727653 - 2⁹ = 75721054727141 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 75721054727591 and 75721054727600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75721054757653) 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, 341488938 + ... + 341710603.

It is an arithmetic number, because the mean of its divisors is an integer number (9546005600595).

Almost surely, 2^{75721054727653} is an apocalyptic number.

It is an amenable number.

75721054727653 is a deficient number, since it is larger than the sum of its proper divisors (646990077107).

75721054727653 is a wasteful number, since it uses less digits than its factorization.

75721054727653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 683200487.

The product of its (nonzero) digits is 86436000, while the sum is 61.

The spelling of 75721054727653 in words is "seventy-five trillion, seven hundred twenty-one billion, fifty-four million, seven hundred twenty-seven thousand, six hundred fifty-three".