64188166738427 has 4 divisors (see below), whose sum is σ = 64190200164576. Its totient is φ = 64186133312280.

The previous prime is 64188166738351. The next prime is 64188166738429. The reversal of 64188166738427 is 72483766188146.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 64188166738427 - 2¹⁶ = 64188166672891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64188166738429) 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, 1016665724 + ... + 1016728857.

It is an arithmetic number, because the mean of its divisors is an integer number (16047550041144).

Almost surely, 2^{64188166738427} is an apocalyptic number.

64188166738427 is a deficient number, since it is larger than the sum of its proper divisors (2033426149).

64188166738427 is a wasteful number, since it uses less digits than its factorization.

64188166738427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2033426148.

The product of its digits is 520224768, while the sum is 71.

The spelling of 64188166738427 in words is "sixty-four trillion, one hundred eighty-eight billion, one hundred sixty-six million, seven hundred thirty-eight thousand, four hundred twenty-seven".