261493952 has 28 divisors (see below), whose sum is σ = 520086336. Its totient is φ = 130448640.

The previous prime is 261493951. The next prime is 261493993. The reversal of 261493952 is 259394162.

It is not an unprimeable number, because it can be changed into a prime (261493951) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25073 + ... + 33935.

It is an arithmetic number, because the mean of its divisors is an integer number (18574512).

Almost surely, 2^261493952 is an apocalyptic number.

It is an amenable number.

261493952 is a deficient number, since it is larger than the sum of its proper divisors (258592384).

261493952 is an equidigital number, since it uses as much as digits as its factorization.

261493952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9336 (or 9326 counting only the distinct ones).

The product of its digits is 116640, while the sum is 41.

The square root of 261493952 is about 16170.7746258489. The cubic root of 261493952 is about 639.4705517112.

The spelling of 261493952 in words is "two hundred sixty-one million, four hundred ninety-three thousand, nine hundred fifty-two".