261192454322 has 18 divisors (see below), whose sum is σ = 393221713143. Its totient is φ = 130120288384.

The previous prime is 261192454283. The next prime is 261192454381. The reversal of 261192454322 is 223454291162.

It can be written as a sum of positive squares in 5 ways, for example, as 4995521041 + 256196933281 = 70679^2 + 506159^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=361381.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 261192454322.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 281153954 + ... + 281154882.

Almost surely, 2^261192454322 is an apocalyptic number.

261192454322 is a deficient number, since it is larger than the sum of its proper divisors (132029258821).

261192454322 is an frugal number, since it uses more digits than its factorization.

261192454322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2638 (or 1320 counting only the distinct ones).

The product of its digits is 207360, while the sum is 41.

The spelling of 261192454322 in words is "two hundred sixty-one billion, one hundred ninety-two million, four hundred fifty-four thousand, three hundred twenty-two".