261673104 has 160 divisors (see below), whose sum is σ = 853945344. Its totient is φ = 67069440.

The previous prime is 261673091. The next prime is 261673133. The reversal of 261673104 is 401376162.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 306342 + ... + 307194.

Almost surely, 2^261673104 is an apocalyptic number.

261673104 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 261673104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (426972672).

261673104 is an abundant number, since it is smaller than the sum of its proper divisors (592272240).

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

261673104 is a wasteful number, since it uses less digits than its factorization.

261673104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 965 (or 959 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 261673104 is about 16176.3130533506. The cubic root of 261673104 is about 639.6165541646.

The spelling of 261673104 in words is "two hundred sixty-one million, six hundred seventy-three thousand, one hundred four".