6131564639 has 2 divisors, whose sum is σ = 6131564640. Its totient is φ = 6131564638.

The previous prime is 6131564611. The next prime is 6131564669. The reversal of 6131564639 is 9364651316.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6131564639 - 2¹⁶ = 6131499103 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6131564639.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6131564609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3065782319 + 3065782320.

It is an arithmetic number, because the mean of its divisors is an integer number (3065782320).

Almost surely, 2^6131564639 is an apocalyptic number.

6131564639 is a deficient number, since it is larger than the sum of its proper divisors (1).

6131564639 is an equidigital number, since it uses as much as digits as its factorization.

6131564639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 349920, while the sum is 44.

The square root of 6131564639 is about 78304.3079210844. The cubic root of 6131564639 is about 1830.3062820589.

The spelling of 6131564639 in words is "six billion, one hundred thirty-one million, five hundred sixty-four thousand, six hundred thirty-nine".