64025384477 has 2 divisors, whose sum is σ = 64025384478. Its totient is φ = 64025384476.

The previous prime is 64025384443. The next prime is 64025384537. The reversal of 64025384477 is 77448352046.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41049191236 + 22976193241 = 202606^2 + 151579^2 .

It is a cyclic number.

It is not a de Polignac number, because 64025384477 - 2²⁶ = 63958275613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64025384417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32012692238 + 32012692239.

It is an arithmetic number, because the mean of its divisors is an integer number (32012692239).

Almost surely, 2^64025384477 is an apocalyptic number.

It is an amenable number.

64025384477 is a deficient number, since it is larger than the sum of its proper divisors (1).

64025384477 is an equidigital number, since it uses as much as digits as its factorization.

64025384477 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4515840, while the sum is 50.

The spelling of 64025384477 in words is "sixty-four billion, twenty-five million, three hundred eighty-four thousand, four hundred seventy-seven".