261084477 has 16 divisors (see below), whose sum is σ = 375776640. Its totient is φ = 160746432.

The previous prime is 261084451. The next prime is 261084479. The reversal of 261084477 is 774480162.

It is not a de Polignac number, because 261084477 - 2⁸ = 261084221 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261084479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63238 + ... + 67239.

It is an arithmetic number, because the mean of its divisors is an integer number (23486040).

Almost surely, 2^261084477 is an apocalyptic number.

It is an amenable number.

261084477 is a deficient number, since it is larger than the sum of its proper divisors (114692163).

261084477 is a wasteful number, since it uses less digits than its factorization.

261084477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130532.

The product of its (nonzero) digits is 75264, while the sum is 39.

The square root of 261084477 is about 16158.1087073952. The cubic root of 261084477 is about 639.1365937015.

The spelling of 261084477 in words is "two hundred sixty-one million, eighty-four thousand, four hundred seventy-seven".