261925576 has 64 divisors (see below), whose sum is σ = 552873600. Its totient is φ = 115315200.

The previous prime is 261925561. The next prime is 261925607. The reversal of 261925576 is 675529162.

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 414781 + ... + 415411.

It is an arithmetic number, because the mean of its divisors is an integer number (8638650).

Almost surely, 2^261925576 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 261925576, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (276436800).

261925576 is an abundant number, since it is smaller than the sum of its proper divisors (290948024).

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

261925576 is a wasteful number, since it uses less digits than its factorization.

261925576 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 790 (or 786 counting only the distinct ones).

The product of its digits is 226800, while the sum is 43.

The square root of 261925576 is about 16184.1149279162. The cubic root of 261925576 is about 639.8221967014.

The spelling of 261925576 in words is "two hundred sixty-one million, nine hundred twenty-five thousand, five hundred seventy-six".