261538046 has 32 divisors (see below), whose sum is σ = 490510080. Its totient is φ = 101606400.

The previous prime is 261538031. The next prime is 261538099. The reversal of 261538046 is 640835162.

It is a junction number, because it is equal to n+sod(n) for n = 261537997 and 261538015.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 56126 + ... + 60606.

It is an arithmetic number, because the mean of its divisors is an integer number (15328440).

Almost surely, 2^261538046 is an apocalyptic number.

261538046 is a deficient number, since it is larger than the sum of its proper divisors (228972034).

261538046 is a wasteful number, since it uses less digits than its factorization.

261538046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4880.

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 261538046 is about 16172.1379539008. The cubic root of 261538046 is about 639.5064929245.

The spelling of 261538046 in words is "two hundred sixty-one million, five hundred thirty-eight thousand, forty-six".