261434435413 has 8 divisors (see below), whose sum is σ = 281594007200. Its totient is φ = 241914850128.

The previous prime is 261434435389. The next prime is 261434435443. The reversal of 261434435413 is 314534434162.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-261434435413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261434435443) 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, 159995778 + ... + 159997411.

It is an arithmetic number, because the mean of its divisors is an integer number (35199250900).

Almost surely, 2^261434435413 is an apocalyptic number.

It is an amenable number.

261434435413 is a deficient number, since it is larger than the sum of its proper divisors (20159571787).

261434435413 is a wasteful number, since it uses less digits than its factorization.

261434435413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319993251.

The product of its digits is 414720, while the sum is 40.

Adding to 261434435413 its reverse (314534434162), we get a palindrome (575968869575).

The spelling of 261434435413 in words is "two hundred sixty-one billion, four hundred thirty-four million, four hundred thirty-five thousand, four hundred thirteen".