261120650 has 48 divisors (see below), whose sum is σ = 556672704. Its totient is φ = 89268480.

The previous prime is 261120649. The next prime is 261120661. The reversal of 261120650 is 56021162.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 150689 + ... + 152411.

It is an arithmetic number, because the mean of its divisors is an integer number (11597348).

Almost surely, 2^261120650 is an apocalyptic number.

261120650 is an abundant number, since it is smaller than the sum of its proper divisors (295552054).

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

261120650 is a wasteful number, since it uses less digits than its factorization.

261120650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2175 (or 2170 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 261120650 is about 16159.2280137388. The cubic root of 261120650 is about 639.1661095893.

The spelling of 261120650 in words is "two hundred sixty-one million, one hundred twenty thousand, six hundred fifty".