261634424 has 16 divisors (see below), whose sum is σ = 490788720. Its totient is φ = 130757440.

The previous prime is 261634423. The next prime is 261634441. The reversal of 261634424 is 424436162.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261634423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15164 + ... + 27444.

It is an arithmetic number, because the mean of its divisors is an integer number (30674295).

Almost surely, 2^261634424 is an apocalyptic number.

It is an amenable number.

261634424 is a deficient number, since it is larger than the sum of its proper divisors (229154296).

261634424 is a wasteful number, since it uses less digits than its factorization.

261634424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14950 (or 14946 counting only the distinct ones).

The product of its digits is 27648, while the sum is 32.

The square root of 261634424 is about 16175.1174338859. The cubic root of 261634424 is about 639.5850369941.

The spelling of 261634424 in words is "two hundred sixty-one million, six hundred thirty-four thousand, four hundred twenty-four".