64978898722951 has 2 divisors, whose sum is σ = 64978898722952. Its totient is φ = 64978898722950.

The previous prime is 64978898722901. The next prime is 64978898722963. The reversal of 64978898722951 is 15922789887946.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64978898722951 - 2¹⁵ = 64978898690183 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64978898722901) 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, 32489449361475 + 32489449361476.

It is an arithmetic number, because the mean of its divisors is an integer number (32489449361476).

Almost surely, 2^{64978898722951} is an apocalyptic number.

64978898722951 is a deficient number, since it is larger than the sum of its proper divisors (1).

64978898722951 is an equidigital number, since it uses as much as digits as its factorization.

64978898722951 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8778792960, while the sum is 85.

The spelling of 64978898722951 in words is "sixty-four trillion, nine hundred seventy-eight billion, eight hundred ninety-eight million, seven hundred twenty-two thousand, nine hundred fifty-one".