64262311021 has 2 divisors, whose sum is σ = 64262311022. Its totient is φ = 64262311020.

The previous prime is 64262310991. The next prime is 64262311033. The reversal of 64262311021 is 12011326246.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62393045796 + 1869265225 = 249786^2 + 43235^2 .

It is a cyclic number.

It is not a de Polignac number, because 64262311021 - 2⁵ = 64262310989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64262321021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32131155510 + 32131155511.

It is an arithmetic number, because the mean of its divisors is an integer number (32131155511).

Almost surely, 2^64262311021 is an apocalyptic number.

It is an amenable number.

64262311021 is a deficient number, since it is larger than the sum of its proper divisors (1).

64262311021 is an equidigital number, since it uses as much as digits as its factorization.

64262311021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 28.

Adding to 64262311021 its reverse (12011326246), we get a palindrome (76273637267).

The spelling of 64262311021 in words is "sixty-four billion, two hundred sixty-two million, three hundred eleven thousand, twenty-one".