261027776 has 56 divisors (see below), whose sum is σ = 551108880. Its totient is φ = 122314752.

The previous prime is 261027751. The next prime is 261027817. The reversal of 261027776 is 677720162.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is an unprimeable number.

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, 116846 + ... + 119058.

It is an arithmetic number, because the mean of its divisors is an integer number (9841230).

Almost surely, 2^261027776 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 261027776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (275554440).

261027776 is an abundant number, since it is smaller than the sum of its proper divisors (290081104).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

261027776 is a wasteful number, since it uses less digits than its factorization.

261027776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2341 (or 2331 counting only the distinct ones).

The product of its (nonzero) digits is 49392, while the sum is 38.

The square root of 261027776 is about 16156.3540441524. The cubic root of 261027776 is about 639.0903222058.

The spelling of 261027776 in words is "two hundred sixty-one million, twenty-seven thousand, seven hundred seventy-six".