261375960 has 32 divisors (see below), whose sum is σ = 784128240. Its totient is φ = 69700224.

The previous prime is 261375937. The next prime is 261375997. The reversal of 261375960 is 69573162.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1088947 + ... + 1089186.

Almost surely, 2^261375960 is an apocalyptic number.

261375960 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

261375960 is an abundant number, since it is smaller than the sum of its proper divisors (522752280).

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

261375960 is a wasteful number, since it uses less digits than its factorization.

261375960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2178147 (or 2178143 counting only the distinct ones).

The product of its (nonzero) digits is 68040, while the sum is 39.

The square root of 261375960 is about 16167.1259041303. The cubic root of 261375960 is about 639.3743560373.

The spelling of 261375960 in words is "two hundred sixty-one million, three hundred seventy-five thousand, nine hundred sixty".