64408348943 has 4 divisors (see below), whose sum is σ = 64408856520. Its totient is φ = 64407841368.

The previous prime is 64408348933. The next prime is 64408348973. The reversal of 64408348943 is 34984380446.

It is a Cunningham number, because it is equal to 253788²-1.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 64408348943 - 2¹⁴ = 64408332559 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64408348933) 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, 126893 + ... + 380681.

It is an arithmetic number, because the mean of its divisors is an integer number (16102214130).

Almost surely, 2^64408348943 is an apocalyptic number.

64408348943 is a deficient number, since it is larger than the sum of its proper divisors (507577).

64408348943 is a wasteful number, since it uses less digits than its factorization.

64408348943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 507576.

The product of its (nonzero) digits is 7962624, while the sum is 53.

The spelling of 64408348943 in words is "sixty-four billion, four hundred eight million, three hundred forty-eight thousand, nine hundred forty-three".