564421631551 has 4 divisors (see below), whose sum is σ = 588961702512. Its totient is φ = 539881560592.

The previous prime is 564421631507. The next prime is 564421631561. The reversal of 564421631551 is 155136124465.

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 564421631551 - 2¹¹ = 564421629503 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 564421631498 and 564421631507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (564421631561) 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, 12270035446 + ... + 12270035491.

It is an arithmetic number, because the mean of its divisors is an integer number (147240425628).

Almost surely, 2^564421631551 is an apocalyptic number.

564421631551 is a deficient number, since it is larger than the sum of its proper divisors (24540070961).

564421631551 is a wasteful number, since it uses less digits than its factorization.

564421631551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24540070960.

The product of its digits is 432000, while the sum is 43.

The spelling of 564421631551 in words is "five hundred sixty-four billion, four hundred twenty-one million, six hundred thirty-one thousand, five hundred fifty-one".