261823530452 has 24 divisors (see below), whose sum is σ = 499991661792. Its totient is φ = 118975757600.

The previous prime is 261823530439. The next prime is 261823530497. The reversal of 261823530452 is 254035328162.

It is a super-2 number, since 2×261823530452² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 721574 + ... + 1021917.

It is an arithmetic number, because the mean of its divisors is an integer number (20832985908).

Almost surely, 2^261823530452 is an apocalyptic number.

261823530452 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

261823530452 is a deficient number, since it is larger than the sum of its proper divisors (238168131340).

261823530452 is a wasteful number, since it uses less digits than its factorization.

261823530452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1746919 (or 1746917 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 41.

The spelling of 261823530452 in words is "two hundred sixty-one billion, eight hundred twenty-three million, five hundred thirty thousand, four hundred fifty-two".