261624652 has 6 divisors (see below), whose sum is σ = 457843148. Its totient is φ = 130812324.

The previous prime is 261624641. The next prime is 261624677. The reversal of 261624652 is 256426162.

It is a super-2 number, since 2×261624652² = 136894917068242208, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32703078 + ... + 32703085.

Almost surely, 2^261624652 is an apocalyptic number.

It is an amenable number.

261624652 is a deficient number, since it is larger than the sum of its proper divisors (196218496).

261624652 is a wasteful number, since it uses less digits than its factorization.

261624652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65406167 (or 65406165 counting only the distinct ones).

The product of its digits is 34560, while the sum is 34.

The square root of 261624652 is about 16174.8153621610. The cubic root of 261624652 is about 639.5770740986.

The spelling of 261624652 in words is "two hundred sixty-one million, six hundred twenty-four thousand, six hundred fifty-two".