424221278687 has 4 divisors (see below), whose sum is σ = 437905836096. Its totient is φ = 410536721280.

The previous prime is 424221278647. The next prime is 424221278693. The reversal of 424221278687 is 786872122424.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 424221278687 - 2²² = 424217084383 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 (424221278647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6842278658 + ... + 6842278719.

It is an arithmetic number, because the mean of its divisors is an integer number (109476459024).

Almost surely, 2^424221278687 is an apocalyptic number.

424221278687 is a deficient number, since it is larger than the sum of its proper divisors (13684557409).

424221278687 is a wasteful number, since it uses less digits than its factorization.

424221278687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13684557408.

The product of its digits is 4816896, while the sum is 53.

The spelling of 424221278687 in words is "four hundred twenty-four billion, two hundred twenty-one million, two hundred seventy-eight thousand, six hundred eighty-seven".