261969035800 has 48 divisors (see below), whose sum is σ = 609124406400. Its totient is φ = 104779632000.

The previous prime is 261969035789. The next prime is 261969035819. The reversal of 261969035800 is 8530969162.

It is a hoax number, since the sum of its digits (49) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

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, 3068086 + ... + 3152314.

It is an arithmetic number, because the mean of its divisors is an integer number (12690091800).

Almost surely, 2^261969035800 is an apocalyptic number.

261969035800 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

261969035800 is an abundant number, since it is smaller than the sum of its proper divisors (347155370600).

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

261969035800 is a wasteful number, since it uses less digits than its factorization.

261969035800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99796 (or 99787 counting only the distinct ones).

The product of its (nonzero) digits is 699840, while the sum is 49.

The spelling of 261969035800 in words is "two hundred sixty-one billion, nine hundred sixty-nine million, thirty-five thousand, eight hundred".