261049964 has 24 divisors (see below), whose sum is σ = 524041728. Its totient is φ = 111462480.

The previous prime is 261049961. The next prime is 261050003. The reversal of 261049964 is 469940162.

It is not an unprimeable number, because it can be changed into a prime (261049961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9614 + ... + 24789.

It is an arithmetic number, because the mean of its divisors is an integer number (21835072).

Almost surely, 2^261049964 is an apocalyptic number.

It is an amenable number.

261049964 is an abundant number, since it is smaller than the sum of its proper divisors (262991764).

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

261049964 is a wasteful number, since it uses less digits than its factorization.

261049964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34685 (or 34683 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 41.

The square root of 261049964 is about 16157.0406943846. The cubic root of 261049964 is about 639.1084297734.

The spelling of 261049964 in words is "two hundred sixty-one million, forty-nine thousand, nine hundred sixty-four".