201561576275026 has 16 divisors (see below), whose sum is σ = 329828294658240. Its totient is φ = 91618825875280.

The previous prime is 201561576274991. The next prime is 201561576275107. The reversal of 201561576275026 is 620572675165102.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33123780 + ... + 38733808.

It is an arithmetic number, because the mean of its divisors is an integer number (20614268416140).

Almost surely, 2^{201561576275026} is an apocalyptic number.

201561576275026 is a deficient number, since it is larger than the sum of its proper divisors (128266718383214).

201561576275026 is a wasteful number, since it uses less digits than its factorization.

201561576275026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7243169.

The product of its (nonzero) digits is 10584000, while the sum is 55.

The spelling of 201561576275026 in words is "two hundred one trillion, five hundred sixty-one billion, five hundred seventy-six million, two hundred seventy-five thousand, twenty-six".