261630532403 has 8 divisors (see below), whose sum is σ = 261785636448. Its totient is φ = 261475478784.

The previous prime is 261630532393. The next prime is 261630532409. The reversal of 261630532403 is 304235036162.

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

It is a cyclic number.

It is not a de Polignac number, because 261630532403 - 2¹⁸ = 261630270259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (261630532409) 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, 15387875 + ... + 15404867.

It is an arithmetic number, because the mean of its divisors is an integer number (32723204556).

Almost surely, 2^261630532403 is an apocalyptic number.

261630532403 is a deficient number, since it is larger than the sum of its proper divisors (155104045).

261630532403 is a wasteful number, since it uses less digits than its factorization.

261630532403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25213.

The product of its (nonzero) digits is 77760, while the sum is 35.

Adding to 261630532403 its reverse (304235036162), we get a palindrome (565865568565).

The spelling of 261630532403 in words is "two hundred sixty-one billion, six hundred thirty million, five hundred thirty-two thousand, four hundred three".