263620212406 has 16 divisors (see below), whose sum is σ = 423990815040. Its totient is φ = 122486232960.

The previous prime is 263620212367. The next prime is 263620212433. The reversal of 263620212406 is 604212026362.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49070325 + ... + 49075696.

It is an arithmetic number, because the mean of its divisors is an integer number (26499425940).

Almost surely, 2^263620212406 is an apocalyptic number.

263620212406 is a deficient number, since it is larger than the sum of its proper divisors (160370602634).

263620212406 is a wasteful number, since it uses less digits than its factorization.

263620212406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98146119.

The product of its (nonzero) digits is 41472, while the sum is 34.

Adding to 263620212406 its reverse (604212026362), we get a palindrome (867832238768).

The spelling of 263620212406 in words is "two hundred sixty-three billion, six hundred twenty million, two hundred twelve thousand, four hundred six".