261016875 has 90 divisors (see below), whose sum is σ = 548627508. Its totient is φ = 119196000.

The previous prime is 261016771. The next prime is 261016883. The reversal of 261016875 is 578610162.

It is not a de Polignac number, because 261016875 - 2⁷ = 261016747 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 89 ways as a sum of consecutive naturals, for example, 275152 + ... + 276098.

Almost surely, 2^261016875 is an apocalyptic number.

261016875 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

261016875 is an abundant number, since it is smaller than the sum of its proper divisors (287610633).

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

261016875 is an equidigital number, since it uses as much as digits as its factorization.

261016875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 987 (or 962 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 261016875 is about 16156.0166811006. The cubic root of 261016875 is about 639.0814255529.

The spelling of 261016875 in words is "two hundred sixty-one million, sixteen thousand, eight hundred seventy-five".