261034553 has 16 divisors (see below), whose sum is σ = 291747456. Its totient is φ = 232001280.

The previous prime is 261034537. The next prime is 261034573. The reversal of 261034553 is 355430162.

It is a cyclic number.

It is not a de Polignac number, because 261034553 - 2⁴ = 261034537 is a prime.

It is not an unprimeable number, because it can be changed into a prime (261034523) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36401 + ... + 42977.

It is an arithmetic number, because the mean of its divisors is an integer number (18234216).

Almost surely, 2^261034553 is an apocalyptic number.

It is an amenable number.

261034553 is a deficient number, since it is larger than the sum of its proper divisors (30712903).

261034553 is a wasteful number, since it uses less digits than its factorization.

261034553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6704.

The product of its (nonzero) digits is 10800, while the sum is 29.

The square root of 261034553 is about 16156.5637745159. The cubic root of 261034553 is about 639.0958530063.

The spelling of 261034553 in words is "two hundred sixty-one million, thirty-four thousand, five hundred fifty-three".