261434435414 has 16 divisors (see below), whose sum is σ = 393023383200. Its totient is φ = 130426963584.

The previous prime is 261434435389. The next prime is 261434435443. The reversal of 261434435414 is 414534434162.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1559672 + ... + 1719140.

It is an arithmetic number, because the mean of its divisors is an integer number (24563961450).

Almost surely, 2^261434435414 is an apocalyptic number.

261434435414 is a deficient number, since it is larger than the sum of its proper divisors (131588947786).

261434435414 is a wasteful number, since it uses less digits than its factorization.

261434435414 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161287.

The product of its digits is 552960, while the sum is 41.

Adding to 261434435414 its reverse (414534434162), we get a palindrome (675968869576).

The spelling of 261434435414 in words is "two hundred sixty-one billion, four hundred thirty-four million, four hundred thirty-five thousand, four hundred fourteen".