201675715272561 has 4 divisors (see below), whose sum is σ = 268900953696752. Its totient is φ = 134450476848372.

The previous prime is 201675715272523. The next prime is 201675715272587. The reversal of 201675715272561 is 165272517576102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 201675715272561 - 2¹⁹ = 201675714748273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201675715272511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33612619212091 + ... + 33612619212096.

It is an arithmetic number, because the mean of its divisors is an integer number (67225238424188).

Almost surely, 2^{201675715272561} is an apocalyptic number.

It is an amenable number.

201675715272561 is a deficient number, since it is larger than the sum of its proper divisors (67225238424191).

201675715272561 is an equidigital number, since it uses as much as digits as its factorization.

201675715272561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67225238424190.

The product of its (nonzero) digits is 12348000, while the sum is 57.

The spelling of 201675715272561 in words is "two hundred one trillion, six hundred seventy-five billion, seven hundred fifteen million, two hundred seventy-two thousand, five hundred sixty-one".