261004641 has 8 divisors (see below), whose sum is σ = 350342400. Its totient is φ = 172834992.

The previous prime is 261004637. The next prime is 261004643. The reversal of 261004641 is 146400162.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 261004641 - 2² = 261004637 is a prime.

It is not an unprimeable number, because it can be changed into a prime (261004643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 291505 + ... + 292398.

It is an arithmetic number, because the mean of its divisors is an integer number (43792800).

Almost surely, 2^261004641 is an apocalyptic number.

It is an amenable number.

261004641 is a deficient number, since it is larger than the sum of its proper divisors (89337759).

261004641 is a wasteful number, since it uses less digits than its factorization.

261004641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 584055.

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 261004641 is about 16155.6380561091. The cubic root of 261004641 is about 639.0714407012.

The spelling of 261004641 in words is "two hundred sixty-one million, four thousand, six hundred forty-one".