261049968 has 60 divisors (see below), whose sum is σ = 769036840. Its totient is φ = 82435968.

The previous prime is 261049961. The next prime is 261050003. The reversal of 261049968 is 869940162.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261049961) 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, 44971 + ... + 50442.

Almost surely, 2^261049968 is an apocalyptic number.

It is an amenable number.

261049968 is an abundant number, since it is smaller than the sum of its proper divisors (507986872).

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

261049968 is a wasteful number, since it uses less digits than its factorization.

261049968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95446 (or 95437 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The square root of 261049968 is about 16157.0408181696. The cubic root of 261049968 is about 639.1084330377.

The spelling of 261049968 in words is "two hundred sixty-one million, forty-nine thousand, nine hundred sixty-eight".