64770588881 has 2 divisors, whose sum is σ = 64770588882. Its totient is φ = 64770588880.

The previous prime is 64770588871. The next prime is 64770588917. The reversal of 64770588881 is 18888507746.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47814382225 + 16956206656 = 218665^2 + 130216^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64770588881 is a prime.

It is a super-2 number, since 2×64770588881² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (64770588871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32385294440 + 32385294441.

It is an arithmetic number, because the mean of its divisors is an integer number (32385294441).

Almost surely, 2^64770588881 is an apocalyptic number.

It is an amenable number.

64770588881 is a deficient number, since it is larger than the sum of its proper divisors (1).

64770588881 is an equidigital number, since it uses as much as digits as its factorization.

64770588881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24084480, while the sum is 62.

The spelling of 64770588881 in words is "sixty-four billion, seven hundred seventy million, five hundred eighty-eight thousand, eight hundred eighty-one".