2631161205202 has 4 divisors (see below), whose sum is σ = 3946741807806. Its totient is φ = 1315580602600.

The previous prime is 2631161205191. The next prime is 2631161205223. The reversal of 2631161205202 is 2025021611362.

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., 2255135927521 + 376025277681 = 1501711^2 + 613209^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 657790301299 + ... + 657790301302.

Almost surely, 2^{2631161205202} is an apocalyptic number.

2631161205202 is a deficient number, since it is larger than the sum of its proper divisors (1315580602604).

2631161205202 is a wasteful number, since it uses less digits than its factorization.

2631161205202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1315580602603.

The product of its (nonzero) digits is 8640, while the sum is 31.

Adding to 2631161205202 its reverse (2025021611362), we get a palindrome (4656182816564).

The spelling of 2631161205202 in words is "two trillion, six hundred thirty-one billion, one hundred sixty-one million, two hundred five thousand, two hundred two".