261994096 has 80 divisors (see below), whose sum is σ = 631181824. Its totient is φ = 102580992.

The previous prime is 261994087. The next prime is 261994111. The reversal of 261994096 is 690499162.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 149095 + ... + 150841.

Almost surely, 2^261994096 is an apocalyptic number.

261994096 is a gapful number since it is divisible by the number (26) 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 261994096, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (315590912).

261994096 is an abundant number, since it is smaller than the sum of its proper divisors (369187728).

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

261994096 is a wasteful number, since it uses less digits than its factorization.

261994096 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1878 (or 1872 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 46.

The square root of 261994096 is about 16186.2316800421. The cubic root of 261994096 is about 639.8779845518.

The spelling of 261994096 in words is "two hundred sixty-one million, nine hundred ninety-four thousand, ninety-six".