64663529251 has 2 divisors, whose sum is σ = 64663529252. Its totient is φ = 64663529250.

The previous prime is 64663529233. The next prime is 64663529267. The reversal of 64663529251 is 15292536646.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64663529251 - 2²⁷ = 64529311523 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 64663529195 and 64663529204.

It is not a weakly prime, because it can be changed into another prime (64663529351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32331764625 + 32331764626.

It is an arithmetic number, because the mean of its divisors is an integer number (32331764626).

Almost surely, 2^64663529251 is an apocalyptic number.

64663529251 is a deficient number, since it is larger than the sum of its proper divisors (1).

64663529251 is an equidigital number, since it uses as much as digits as its factorization.

64663529251 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2332800, while the sum is 49.

The spelling of 64663529251 in words is "sixty-four billion, six hundred sixty-three million, five hundred twenty-nine thousand, two hundred fifty-one".