250764561 has 12 divisors (see below), whose sum is σ = 377964288. Its totient is φ = 159907704.

The previous prime is 250764557. The next prime is 250764581. The reversal of 250764561 is 165467052.

It is a happy number.

250764561 is a `hidden beast` number, since 2 + 5 + 0 + 7 + 645 + 6 + 1 = 666.

It is not a de Polignac number, because 250764561 - 2² = 250764557 is a prime.

It is not an unprimeable number, because it can be changed into a prime (250764541) 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, 605505 + ... + 605918.

It is an arithmetic number, because the mean of its divisors is an integer number (31497024).

Almost surely, 2^250764561 is an apocalyptic number.

It is an amenable number.

250764561 is a deficient number, since it is larger than the sum of its proper divisors (127199727).

250764561 is a wasteful number, since it uses less digits than its factorization.

250764561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1211452 (or 1211449 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

The square root of 250764561 is about 15835.5473855500. The cubic root of 250764561 is about 630.6020623971.

The spelling of 250764561 in words is "two hundred fifty million, seven hundred sixty-four thousand, five hundred sixty-one".