71561806653201 has 16 divisors (see below), whose sum is σ = 96237191265600. Its totient is φ = 47298052251648.

The previous prime is 71561806653187. The next prime is 71561806653217. The reversal of 71561806653201 is 10235660816517.

It is not a de Polignac number, because 71561806653201 - 2⁶ = 71561806653137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (71561806653251) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 112893511 + ... + 113525628.

It is an arithmetic number, because the mean of its divisors is an integer number (6014824454100).

Almost surely, 2^{71561806653201} is an apocalyptic number.

It is an amenable number.

71561806653201 is a deficient number, since it is larger than the sum of its proper divisors (24675384612399).

71561806653201 is a wasteful number, since it uses less digits than its factorization.

71561806653201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226420048.

The product of its (nonzero) digits is 1814400, while the sum is 51.

The spelling of 71561806653201 in words is "seventy-one trillion, five hundred sixty-one billion, eight hundred six million, six hundred fifty-three thousand, two hundred one".