261448011 has 12 divisors (see below), whose sum is σ = 411978840. Its totient is φ = 158453280.

The previous prime is 261448001. The next prime is 261448043. The reversal of 261448011 is 110844162.

It is a happy number.

261448011 is a `hidden beast` number, since 2 + 614 + 48 + 0 + 1 + 1 = 666.

It is not a de Polignac number, because 261448011 - 2¹³ = 261439819 is a prime.

It is a super-2 number, since 2×261448011² = 136710124911712242, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (261448001) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1320346 + ... + 1320543.

It is an arithmetic number, because the mean of its divisors is an integer number (34331570).

Almost surely, 2^261448011 is an apocalyptic number.

261448011 is a deficient number, since it is larger than the sum of its proper divisors (150530829).

261448011 is a wasteful number, since it uses less digits than its factorization.

261448011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2640906 (or 2640903 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 261448011 is about 16169.3540687314. The cubic root of 261448011 is about 639.4331007019.

It can be divided in two parts, 2614 and 48011, that added together give a 4-th power (50625 = 15⁴).

The spelling of 261448011 in words is "two hundred sixty-one million, four hundred forty-eight thousand, eleven".