7725571102561 has 8 divisors (see below), whose sum is σ = 8405617410344. Its totient is φ = 7057777881600.

The previous prime is 7725571102537. The next prime is 7725571102591. The reversal of 7725571102561 is 1652011755277.

It can be written as a sum of positive squares in 4 ways, for example, as 27970555536 + 7697600547025 = 167244^2 + 2774455^2 .

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 7725571102561 - 2¹³ = 7725571094369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7725571102511) 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, 3063270390 + ... + 3063272911.

It is an arithmetic number, because the mean of its divisors is an integer number (1050702176293).

Almost surely, 2^{7725571102561} is an apocalyptic number.

It is an amenable number.

7725571102561 is a deficient number, since it is larger than the sum of its proper divisors (680046307783).

7725571102561 is a wasteful number, since it uses less digits than its factorization.

7725571102561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6126543411.

The product of its (nonzero) digits is 1029000, while the sum is 49.

The spelling of 7725571102561 in words is "seven trillion, seven hundred twenty-five billion, five hundred seventy-one million, one hundred two thousand, five hundred sixty-one".