64863203381 has 2 divisors, whose sum is σ = 64863203382. Its totient is φ = 64863203380.

The previous prime is 64863203359. The next prime is 64863203393. The reversal of 64863203381 is 18330236846.

64863203381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64259715025 + 603488356 = 253495^2 + 24566^2 .

It is a cyclic number.

It is not a de Polignac number, because 64863203381 - 2²² = 64859009077 is a prime.

It is a super-2 number, since 2×64863203381² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64863203311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32431601690 + 32431601691.

It is an arithmetic number, because the mean of its divisors is an integer number (32431601691).

Almost surely, 2^64863203381 is an apocalyptic number.

It is an amenable number.

64863203381 is a deficient number, since it is larger than the sum of its proper divisors (1).

64863203381 is an equidigital number, since it uses as much as digits as its factorization.

64863203381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 497664, while the sum is 44.

The spelling of 64863203381 in words is "sixty-four billion, eight hundred sixty-three million, two hundred three thousand, three hundred eighty-one".