64340367836551 has 2 divisors, whose sum is σ = 64340367836552. Its totient is φ = 64340367836550.

The previous prime is 64340367836443. The next prime is 64340367836573. The reversal of 64340367836551 is 15563876304346.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64340367836551 - 2²³ = 64340359447943 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 64340367836551.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64340367836851) 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, 32170183918275 + 32170183918276.

It is an arithmetic number, because the mean of its divisors is an integer number (32170183918276).

Almost surely, 2^{64340367836551} is an apocalyptic number.

64340367836551 is a deficient number, since it is larger than the sum of its proper divisors (1).

64340367836551 is an equidigital number, since it uses as much as digits as its factorization.

64340367836551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 130636800, while the sum is 61.

The spelling of 64340367836551 in words is "sixty-four trillion, three hundred forty billion, three hundred sixty-seven million, eight hundred thirty-six thousand, five hundred fifty-one".