2251334635406 has 16 divisors (see below), whose sum is σ = 3470614290000. Its totient is φ = 1094504293440.

The previous prime is 2251334635387. The next prime is 2251334635421. The reversal of 2251334635406 is 6045364331522.

It is a happy number.

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, 10161656 + ... + 10380843.

It is an arithmetic number, because the mean of its divisors is an integer number (216913393125).

Almost surely, 2^{2251334635406} is an apocalyptic number.

2251334635406 is a deficient number, since it is larger than the sum of its proper divisors (1219279654594).

2251334635406 is a wasteful number, since it uses less digits than its factorization.

2251334635406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20544019.

The product of its (nonzero) digits is 1555200, while the sum is 44.

Adding to 2251334635406 its reverse (6045364331522), we get a palindrome (8296698966928).

The spelling of 2251334635406 in words is "two trillion, two hundred fifty-one billion, three hundred thirty-four million, six hundred thirty-five thousand, four hundred six".