261422562506244 has 48 divisors (see below), whose sum is σ = 613329974320896. Its totient is φ = 86664416185600.

The previous prime is 261422562506221. The next prime is 261422562506263. The reversal of 261422562506244 is 442605265224162.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78085617 + ... + 81364664.

It is an arithmetic number, because the mean of its divisors is an integer number (12777707798352).

Almost surely, 2^{261422562506244} is an apocalyptic number.

It is an amenable number.

261422562506244 is an abundant number, since it is smaller than the sum of its proper divisors (351907411814652).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

261422562506244 is a wasteful number, since it uses less digits than its factorization.

261422562506244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159451036 (or 159451034 counting only the distinct ones).

The product of its (nonzero) digits is 11059200, while the sum is 51.

The spelling of 261422562506244 in words is "two hundred sixty-one trillion, four hundred twenty-two billion, five hundred sixty-two million, five hundred six thousand, two hundred forty-four".