64428763722943 has 2 divisors, whose sum is σ = 64428763722944. Its totient is φ = 64428763722942.

The previous prime is 64428763722937. The next prime is 64428763723033. The reversal of 64428763722943 is 34922736782446.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64428763722943 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64428763722913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32214381861471 + 32214381861472.

It is an arithmetic number, because the mean of its divisors is an integer number (32214381861472).

Almost surely, 2^{64428763722943} is an apocalyptic number.

64428763722943 is a deficient number, since it is larger than the sum of its proper divisors (1).

64428763722943 is an equidigital number, since it uses as much as digits as its factorization.

64428763722943 is an evil number, because the sum of its binary digits is even.

The product of its digits is 585252864, while the sum is 67.

The spelling of 64428763722943 in words is "sixty-four trillion, four hundred twenty-eight billion, seven hundred sixty-three million, seven hundred twenty-two thousand, nine hundred forty-three".