202561337052161 has 4 divisors (see below), whose sum is σ = 202562907144192. Its totient is φ = 202559766960132.

The previous prime is 202561337052133. The next prime is 202561337052169. The reversal of 202561337052161 is 161250733165202.

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 a cyclic number.

It is not a de Polignac number, because 202561337052161 - 2¹⁰ = 202561337051137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (202561337052169) 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, 784852481 + ... + 785110526.

It is an arithmetic number, because the mean of its divisors is an integer number (50640726786048).

Almost surely, 2^{202561337052161} is an apocalyptic number.

It is an amenable number.

202561337052161 is a deficient number, since it is larger than the sum of its proper divisors (1570092031).

202561337052161 is a wasteful number, since it uses less digits than its factorization.

202561337052161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1570092030.

The product of its (nonzero) digits is 453600, while the sum is 44.

The spelling of 202561337052161 in words is "two hundred two trillion, five hundred sixty-one billion, three hundred thirty-seven million, fifty-two thousand, one hundred sixty-one".