261416624 has 20 divisors (see below), whose sum is σ = 578851344. Its totient is φ = 112035648.

The previous prime is 261416593. The next prime is 261416641. The reversal of 261416624 is 426614162.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1166927 + ... + 1167150.

Almost surely, 2^261416624 is an apocalyptic number.

It is an amenable number.

261416624 is an abundant number, since it is smaller than the sum of its proper divisors (317434720).

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

261416624 is a wasteful number, since it uses less digits than its factorization.

261416624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2334092 (or 2334086 counting only the distinct ones).

The product of its digits is 13824, while the sum is 32.

The square root of 261416624 is about 16168.3834689804. The cubic root of 261416624 is about 639.4075115611.

The spelling of 261416624 in words is "two hundred sixty-one million, four hundred sixteen thousand, six hundred twenty-four".