64191478738571 has 16 divisors (see below), whose sum is σ = 68154078034944. Its totient is φ = 60249623036544.

The previous prime is 64191478738553. The next prime is 64191478738589. The reversal of 64191478738571 is 17583787419146.

It is an interprime number because it is at equal distance from previous prime (64191478738553) and next prime (64191478738589).

It is a cyclic number.

It is not a de Polignac number, because 64191478738571 - 2⁴² = 59793432227467 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64191478738495 and 64191478738504.

It is not an unprimeable number, because it can be changed into a prime (64191478734571) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 440793656 + ... + 440939258.

It is an arithmetic number, because the mean of its divisors is an integer number (4259629877184).

Almost surely, 2^{64191478738571} is an apocalyptic number.

64191478738571 is a deficient number, since it is larger than the sum of its proper divisors (3962599296373).

64191478738571 is a wasteful number, since it uses less digits than its factorization.

64191478738571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216650.

The product of its digits is 284497920, while the sum is 71.

The spelling of 64191478738571 in words is "sixty-four trillion, one hundred ninety-one billion, four hundred seventy-eight million, seven hundred thirty-eight thousand, five hundred seventy-one".