261516327 has 8 divisors (see below), whose sum is σ = 357193200. Its totient is φ = 170091840.

The previous prime is 261516293. The next prime is 261516329. The reversal of 261516327 is 723615162.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-261516327 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261516329) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1062952 + ... + 1063197.

It is an arithmetic number, because the mean of its divisors is an integer number (44649150).

Almost surely, 2^261516327 is an apocalyptic number.

261516327 is a deficient number, since it is larger than the sum of its proper divisors (95676873).

261516327 is a wasteful number, since it uses less digits than its factorization.

261516327 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2126193.

The product of its digits is 15120, while the sum is 33.

The square root of 261516327 is about 16171.4664455639. The cubic root of 261516327 is about 639.4887901770.

The spelling of 261516327 in words is "two hundred sixty-one million, five hundred sixteen thousand, three hundred twenty-seven".