261610054 has 16 divisors (see below), whose sum is σ = 416025216. Its totient is φ = 123163200.

The previous prime is 261610049. The next prime is 261610057. The reversal of 261610054 is 450016162.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261610057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54727 + ... + 59314.

It is an arithmetic number, because the mean of its divisors is an integer number (26001576).

Almost surely, 2^261610054 is an apocalyptic number.

261610054 is a deficient number, since it is larger than the sum of its proper divisors (154415162).

261610054 is a wasteful number, since it uses less digits than its factorization.

261610054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114111.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 261610054 is about 16174.3640987830. The cubic root of 261610054 is about 639.5651782780.

The spelling of 261610054 in words is "two hundred sixty-one million, six hundred ten thousand, fifty-four".