261202650 has 24 divisors (see below), whose sum is σ = 647782944. Its totient is φ = 69654000.

The previous prime is 261202589. The next prime is 261202657. The reversal of 261202650 is 56202162.

It is a self number, because there is not a number n which added to its sum of digits gives 261202650.

It is not an unprimeable number, because it can be changed into a prime (261202657) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 870526 + ... + 870825.

It is an arithmetic number, because the mean of its divisors is an integer number (26990956).

Almost surely, 2^261202650 is an apocalyptic number.

261202650 is an abundant number, since it is smaller than the sum of its proper divisors (386580294).

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

261202650 is a wasteful number, since it uses less digits than its factorization.

261202650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1741366 (or 1741361 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 261202650 is about 16161.7650644971. The cubic root of 261202650 is about 639.2330085951.

The spelling of 261202650 in words is "two hundred sixty-one million, two hundred two thousand, six hundred fifty".