64954568251 has 2 divisors, whose sum is σ = 64954568252. Its totient is φ = 64954568250.

The previous prime is 64954568221. The next prime is 64954568279. The reversal of 64954568251 is 15286545946.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64954568251 - 2⁵ = 64954568219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 64954568192 and 64954568201.

It is not a weakly prime, because it can be changed into another prime (64954568221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32477284125 + 32477284126.

It is an arithmetic number, because the mean of its divisors is an integer number (32477284126).

Almost surely, 2^64954568251 is an apocalyptic number.

64954568251 is a deficient number, since it is larger than the sum of its proper divisors (1).

64954568251 is an equidigital number, since it uses as much as digits as its factorization.

64954568251 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10368000, while the sum is 55.

The spelling of 64954568251 in words is "sixty-four billion, nine hundred fifty-four million, five hundred sixty-eight thousand, two hundred fifty-one".