263421417847 has 12 divisors (see below), whose sum is σ = 307427153880. Its totient is φ = 225054302256.

The previous prime is 263421417841. The next prime is 263421417863. The reversal of 263421417847 is 748714124362.

It is not a de Polignac number, because 263421417847 - 2¹⁵ = 263421385079 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a self number, because there is not a number n which added to its sum of digits gives 263421417847.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (263421417841) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 8740572 + ... + 8770657.

It is an arithmetic number, because the mean of its divisors is an integer number (25618929490).

Almost surely, 2^263421417847 is an apocalyptic number.

263421417847 is a deficient number, since it is larger than the sum of its proper divisors (44005736033).

263421417847 is a wasteful number, since it uses less digits than its factorization.

263421417847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17511550 (or 17511543 counting only the distinct ones).

The product of its digits is 1806336, while the sum is 49.

The spelling of 263421417847 in words is "two hundred sixty-three billion, four hundred twenty-one million, four hundred seventeen thousand, eight hundred forty-seven".