261248188 has 6 divisors (see below), whose sum is σ = 457184336. Its totient is φ = 130624092.

The previous prime is 261248167. The next prime is 261248189. The reversal of 261248188 is 881842162.

It is a self number, because there is not a number n which added to its sum of digits gives 261248188.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261248189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32656020 + ... + 32656027.

Almost surely, 2^261248188 is an apocalyptic number.

It is an amenable number.

261248188 is a deficient number, since it is larger than the sum of its proper divisors (195936148).

261248188 is a wasteful number, since it uses less digits than its factorization.

261248188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65312051 (or 65312049 counting only the distinct ones).

The product of its digits is 49152, while the sum is 40.

The square root of 261248188 is about 16163.1738219942. The cubic root of 261248188 is about 639.2701543403.

The spelling of 261248188 in words is "two hundred sixty-one million, two hundred forty-eight thousand, one hundred eighty-eight".