64464252649 has 2 divisors, whose sum is σ = 64464252650. Its totient is φ = 64464252648.

The previous prime is 64464252623. The next prime is 64464252667. The reversal of 64464252649 is 94625246446.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39628068624 + 24836184025 = 199068^2 + 157595^2 .

It is a cyclic number.

It is not a de Polignac number, because 64464252649 - 2⁵ = 64464252617 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 64464252596 and 64464252605.

It is not a weakly prime, because it can be changed into another prime (64464252679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32232126324 + 32232126325.

It is an arithmetic number, because the mean of its divisors is an integer number (32232126325).

Almost surely, 2^64464252649 is an apocalyptic number.

It is an amenable number.

64464252649 is a deficient number, since it is larger than the sum of its proper divisors (1).

64464252649 is an equidigital number, since it uses as much as digits as its factorization.

64464252649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9953280, while the sum is 52.

The spelling of 64464252649 in words is "sixty-four billion, four hundred sixty-four million, two hundred fifty-two thousand, six hundred forty-nine".