261111730162 has 4 divisors (see below), whose sum is σ = 391667595246. Its totient is φ = 130555865080.

The previous prime is 261111730157. The next prime is 261111730171. The reversal of 261111730162 is 261037111162.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 168732814441 + 92378915721 = 410771^2 + 303939^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65277932539 + ... + 65277932542.

Almost surely, 2^261111730162 is an apocalyptic number.

261111730162 is a deficient number, since it is larger than the sum of its proper divisors (130555865084).

261111730162 is a wasteful number, since it uses less digits than its factorization.

261111730162 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130555865083.

The product of its (nonzero) digits is 3024, while the sum is 31.

The spelling of 261111730162 in words is "two hundred sixty-one billion, one hundred eleven million, seven hundred thirty thousand, one hundred sixty-two".