64515428543 has 2 divisors, whose sum is σ = 64515428544. Its totient is φ = 64515428542.

The previous prime is 64515428539. The next prime is 64515428573. The reversal of 64515428543 is 34582451546.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64515428543 - 2² = 64515428539 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64515428503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32257714271 + 32257714272.

It is an arithmetic number, because the mean of its divisors is an integer number (32257714272).

Almost surely, 2^64515428543 is an apocalyptic number.

64515428543 is a deficient number, since it is larger than the sum of its proper divisors (1).

64515428543 is an equidigital number, since it uses as much as digits as its factorization.

64515428543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2304000, while the sum is 47.

The spelling of 64515428543 in words is "sixty-four billion, five hundred fifteen million, four hundred twenty-eight thousand, five hundred forty-three".