15640064459 has 2 divisors, whose sum is σ = 15640064460. Its totient is φ = 15640064458.

The previous prime is 15640064449. The next prime is 15640064471. The reversal of 15640064459 is 95446004651.

15640064459 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 15640064459 - 2¹² = 15640060363 is a prime.

It is a super-2 number, since 2×15640064459² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (15640064449) 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, 7820032229 + 7820032230.

It is an arithmetic number, because the mean of its divisors is an integer number (7820032230).

Almost surely, 2^15640064459 is an apocalyptic number.

15640064459 is a deficient number, since it is larger than the sum of its proper divisors (1).

15640064459 is an equidigital number, since it uses as much as digits as its factorization.

15640064459 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 518400, while the sum is 44.

The spelling of 15640064459 in words is "fifteen billion, six hundred forty million, sixty-four thousand, four hundred fifty-nine".