261765472 has 24 divisors (see below), whose sum is σ = 518643216. Its totient is φ = 130046592.

The previous prime is 261765433. The next prime is 261765479. The reversal of 261765472 is 274567162.

261765472 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261765479) 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, 21028 + ... + 31075.

It is an arithmetic number, because the mean of its divisors is an integer number (21610134).

Almost surely, 2^261765472 is an apocalyptic number.

It is an amenable number.

261765472 is a deficient number, since it is larger than the sum of its proper divisors (256877744).

261765472 is a wasteful number, since it uses less digits than its factorization.

261765472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52270 (or 52262 counting only the distinct ones).

The product of its digits is 141120, while the sum is 40.

The square root of 261765472 is about 16179.1678401579. The cubic root of 261765472 is about 639.6918047358.

The spelling of 261765472 in words is "two hundred sixty-one million, seven hundred sixty-five thousand, four hundred seventy-two".