261471608 has 16 divisors (see below), whose sum is σ = 506074560. Its totient is φ = 126518400.

The previous prime is 261471571. The next prime is 261471641. The reversal of 261471608 is 806174162.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 526913 + ... + 527408.

It is an arithmetic number, because the mean of its divisors is an integer number (31629660).

Almost surely, 2^261471608 is an apocalyptic number.

It is an amenable number.

261471608 is a deficient number, since it is larger than the sum of its proper divisors (244602952).

261471608 is a wasteful number, since it uses less digits than its factorization.

261471608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1054358 (or 1054354 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 261471608 is about 16170.0837350955. The cubic root of 261471608 is about 639.4523374760.

The spelling of 261471608 in words is "two hundred sixty-one million, four hundred seventy-one thousand, six hundred eight".