64994512951 has 2 divisors, whose sum is σ = 64994512952. Its totient is φ = 64994512950.

The previous prime is 64994512949. The next prime is 64994513011. The reversal of 64994512951 is 15921549946.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64994512951 - 2¹ = 64994512949 is a prime.

Together with 64994512949, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 64994512892 and 64994512901.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64994212951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32497256475 + 32497256476.

It is an arithmetic number, because the mean of its divisors is an integer number (32497256476).

Almost surely, 2^64994512951 is an apocalyptic number.

64994512951 is a deficient number, since it is larger than the sum of its proper divisors (1).

64994512951 is an equidigital number, since it uses as much as digits as its factorization.

64994512951 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3499200, while the sum is 55.

The spelling of 64994512951 in words is "sixty-four billion, nine hundred ninety-four million, five hundred twelve thousand, nine hundred fifty-one".