64738745387 has 2 divisors, whose sum is σ = 64738745388. Its totient is φ = 64738745386.

The previous prime is 64738745329. The next prime is 64738745413. The reversal of 64738745387 is 78354783746.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64738745387 is a prime.

It is a super-2 number, since 2×64738745387² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (64738741387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32369372693 + 32369372694.

It is an arithmetic number, because the mean of its divisors is an integer number (32369372694).

Almost surely, 2^64738745387 is an apocalyptic number.

64738745387 is a deficient number, since it is larger than the sum of its proper divisors (1).

64738745387 is an equidigital number, since it uses as much as digits as its factorization.

64738745387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 94832640, while the sum is 62.

The spelling of 64738745387 in words is "sixty-four billion, seven hundred thirty-eight million, seven hundred forty-five thousand, three hundred eighty-seven".