261264632 has 16 divisors (see below), whose sum is σ = 490698000. Its totient is φ = 130411840.

The previous prime is 261264623. The next prime is 261264637. The reversal of 261264632 is 236462162.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261264637) 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, 22469 + ... + 32052.

It is an arithmetic number, because the mean of its divisors is an integer number (30668625).

Almost surely, 2^261264632 is an apocalyptic number.

It is an amenable number.

261264632 is a deficient number, since it is larger than the sum of its proper divisors (229433368).

261264632 is a wasteful number, since it uses less digits than its factorization.

261264632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55126 (or 55122 counting only the distinct ones).

The product of its digits is 20736, while the sum is 32.

The square root of 261264632 is about 16163.6825012124. The cubic root of 261264632 is about 639.2835667943.

The spelling of 261264632 in words is "two hundred sixty-one million, two hundred sixty-four thousand, six hundred thirty-two".