260381655 has 16 divisors (see below), whose sum is σ = 462900960. Its totient is φ = 138870144.

The previous prime is 260381651. The next prime is 260381663. The reversal of 260381655 is 556183062.

It is not a de Polignac number, because 260381655 - 2² = 260381651 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (260381651) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 964242 + ... + 964511.

It is an arithmetic number, because the mean of its divisors is an integer number (28931310).

Almost surely, 2^260381655 is an apocalyptic number.

260381655 is a deficient number, since it is larger than the sum of its proper divisors (202519305).

260381655 is a wasteful number, since it uses less digits than its factorization.

260381655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1928767 (or 1928761 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The square root of 260381655 is about 16136.3457759184. The cubic root of 260381655 is about 638.5625739569.

The spelling of 260381655 in words is "two hundred sixty million, three hundred eighty-one thousand, six hundred fifty-five".