64147605427 has 2 divisors, whose sum is σ = 64147605428. Its totient is φ = 64147605426.

The previous prime is 64147605419. The next prime is 64147605461. The reversal of 64147605427 is 72450674146.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64147605427 - 2³ = 64147605419 is a prime.

It is a super-2 number, since 2×64147605427² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (64147605227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32073802713 + 32073802714.

It is an arithmetic number, because the mean of its divisors is an integer number (32073802714).

Almost surely, 2^64147605427 is an apocalyptic number.

64147605427 is a deficient number, since it is larger than the sum of its proper divisors (1).

64147605427 is an equidigital number, since it uses as much as digits as its factorization.

64147605427 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1128960, while the sum is 46.

The spelling of 64147605427 in words is "sixty-four billion, one hundred forty-seven million, six hundred five thousand, four hundred twenty-seven".