261450371651332 has 12 divisors (see below), whose sum is σ = 457581921452236. Its totient is φ = 130712679807840.

The previous prime is 261450371651327. The next prime is 261450371651377. The reversal of 261450371651332 is 233156173054162.

It can be written as a sum of positive squares in 2 ways, for example, as 164364348457156 + 97086023194176 = 12820466^2 + 9853224^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3126457419 + ... + 3126541042.

Almost surely, 2^{261450371651332} is an apocalyptic number.

It is an amenable number.

261450371651332 is a deficient number, since it is larger than the sum of its proper divisors (196131549800904).

261450371651332 is a wasteful number, since it uses less digits than its factorization.

261450371651332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6253008918 (or 6253008916 counting only the distinct ones).

The product of its (nonzero) digits is 2721600, while the sum is 49.

The spelling of 261450371651332 in words is "two hundred sixty-one trillion, four hundred fifty billion, three hundred seventy-one million, six hundred fifty-one thousand, three hundred thirty-two".