261416968 has 8 divisors (see below), whose sum is σ = 490156830. Its totient is φ = 130708480.

The previous prime is 261416923. The next prime is 261416971. The reversal of 261416968 is 869614162.

It can be written as a sum of positive squares in only one way, i.e., 243422404 + 17994564 = 15602^2 + 4242^2 .

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, 16338553 + ... + 16338568.

Almost surely, 2^261416968 is an apocalyptic number.

It is an amenable number.

261416968 is a deficient number, since it is larger than the sum of its proper divisors (228739862).

261416968 is a wasteful number, since it uses less digits than its factorization.

261416968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32677127 (or 32677123 counting only the distinct ones).

The product of its digits is 124416, while the sum is 43.

The square root of 261416968 is about 16168.3941070225. The cubic root of 261416968 is about 639.4077920280.

The spelling of 261416968 in words is "two hundred sixty-one million, four hundred sixteen thousand, nine hundred sixty-eight".