261804706875 has 240 divisors, whose sum is σ = 535782094848. Its totient is φ = 127137600000.

The previous prime is 261804706873. The next prime is 261804706879. The reversal of 261804706875 is 578607408162.

261804706875 is a `hidden beast` number, since 26 + 1 + 80 + 470 + 6 + 8 + 75 = 666.

It is not a de Polignac number, because 261804706875 - 2¹ = 261804706873 is a prime.

It is not an unprimeable number, because it can be changed into a prime (261804706871) by changing a digit.

It is a polite number, since it can be written in 239 ways as a sum of consecutive naturals, for example, 80036490 + ... + 80039760.

Almost surely, 2^261804706875 is an apocalyptic number.

261804706875 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

261804706875 is an abundant number, since it is smaller than the sum of its proper divisors (273977387973).

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

261804706875 is an equidigital number, since it uses as much as digits as its factorization.

261804706875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3354 (or 3327 counting only the distinct ones).

The product of its (nonzero) digits is 4515840, while the sum is 54.

The spelling of 261804706875 in words is "two hundred sixty-one billion, eight hundred four million, seven hundred six thousand, eight hundred seventy-five".