261450408900 has 36 divisors (see below), whose sum is σ = 756463183952. Its totient is φ = 69720108960.

The previous prime is 261450408893. The next prime is 261450408931. The reversal of 261450408900 is 9804054162.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 435750382 + ... + 435750981.

Almost surely, 2^261450408900 is an apocalyptic number.

261450408900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

261450408900 is an abundant number, since it is smaller than the sum of its proper divisors (495012775052).

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

261450408900 is a wasteful number, since it uses less digits than its factorization.

261450408900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 871501380 (or 871501373 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 39.

The spelling of 261450408900 in words is "two hundred sixty-one billion, four hundred fifty million, four hundred eight thousand, nine hundred".