261016824 has 32 divisors (see below), whose sum is σ = 668460240. Its totient is φ = 84883200.

The previous prime is 261016771. The next prime is 261016883. The reversal of 261016824 is 428610162.

It is a super-2 number, since 2×261016824² = 136259564822093952, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 261016791 and 261016800.

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 7 ways as a sum of consecutive naturals, for example, 131647 + ... + 133614.

Almost surely, 2^261016824 is an apocalyptic number.

261016824 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

261016824 is an abundant number, since it is smaller than the sum of its proper divisors (407443416).

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

261016824 is a wasteful number, since it uses less digits than its factorization.

261016824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265311 (or 265307 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 261016824 is about 16156.0151027411. The cubic root of 261016824 is about 639.0813839296.

Adding to 261016824 its reverse (428610162), we get a palindrome (689626986).

The spelling of 261016824 in words is "two hundred sixty-one million, sixteen thousand, eight hundred twenty-four".