64457522906791 has 12 divisors (see below), whose sum is σ = 74988387636912. Its totient is φ = 55244009280768.

The previous prime is 64457522906779. The next prime is 64457522906869. The reversal of 64457522906791 is 19760922575446.

It is not a de Polignac number, because 64457522906791 - 2¹⁹ = 64457522382503 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 (64457522906701) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 62531995 + ... + 63554428.

It is an arithmetic number, because the mean of its divisors is an integer number (6249032303076).

Almost surely, 2^{64457522906791} is an apocalyptic number.

64457522906791 is a deficient number, since it is larger than the sum of its proper divisors (10530864730121).

64457522906791 is a wasteful number, since it uses less digits than its factorization.

64457522906791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126096870 (or 126096863 counting only the distinct ones).

The product of its (nonzero) digits is 228614400, while the sum is 67.

The spelling of 64457522906791 in words is "sixty-four trillion, four hundred fifty-seven billion, five hundred twenty-two million, nine hundred six thousand, seven hundred ninety-one".