261625463 has 4 divisors (see below), whose sum is σ = 285409608. Its totient is φ = 237841320.

The previous prime is 261625447. The next prime is 261625477. The reversal of 261625463 is 364526162.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 261625463 - 2⁴ = 261625447 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261625423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11892056 + ... + 11892077.

It is an arithmetic number, because the mean of its divisors is an integer number (71352402).

Almost surely, 2^261625463 is an apocalyptic number.

261625463 is a deficient number, since it is larger than the sum of its proper divisors (23784145).

261625463 is a wasteful number, since it uses less digits than its factorization.

261625463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23784144.

The product of its digits is 51840, while the sum is 35.

The square root of 261625463 is about 16174.8404319795. The cubic root of 261625463 is about 639.5777349645.

The spelling of 261625463 in words is "two hundred sixty-one million, six hundred twenty-five thousand, four hundred sixty-three".