261651848 has 8 divisors (see below), whose sum is σ = 490597230. Its totient is φ = 130825920.

The previous prime is 261651829. The next prime is 261651853. The reversal of 261651848 is 848156162.

It can be written as a sum of positive squares in only one way, i.e., 230493124 + 31158724 = 15182^2 + 5582^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16353233 + ... + 16353248.

Almost surely, 2^261651848 is an apocalyptic number.

It is an amenable number.

261651848 is a deficient number, since it is larger than the sum of its proper divisors (228945382).

261651848 is a wasteful number, since it uses less digits than its factorization.

261651848 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32706487 (or 32706483 counting only the distinct ones).

The product of its digits is 92160, while the sum is 41.

The square root of 261651848 is about 16175.6560299729. The cubic root of 261651848 is about 639.5992347720.

The spelling of 261651848 in words is "two hundred sixty-one million, six hundred fifty-one thousand, eight hundred forty-eight".