Search a number
-
+
64394051507 is a prime number
BaseRepresentation
bin111011111110001011…
…110011111110110011
320011012201202202020122
4323332023303332303
52023334334122012
645325432000455
74436513256332
oct737613637663
9204181682218
1064394051507
1125344843a95
121059153012b
1360c2bb9776
14318c29dd19
151a1d3b3e72
hexefe2f3fb3

64394051507 has 2 divisors, whose sum is σ = 64394051508. Its totient is φ = 64394051506.

The previous prime is 64394051431. The next prime is 64394051509. The reversal of 64394051507 is 70515049346.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64394051507 - 212 = 64394047411 is a prime.

Together with 64394051509, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (64394051509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32197025753 + 32197025754.

It is an arithmetic number, because the mean of its divisors is an integer number (32197025754).

Almost surely, 264394051507 is an apocalyptic number.

64394051507 is a deficient number, since it is larger than the sum of its proper divisors (1).

64394051507 is an equidigital number, since it uses as much as digits as its factorization.

64394051507 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 453600, while the sum is 44.

The spelling of 64394051507 in words is "sixty-four billion, three hundred ninety-four million, fifty-one thousand, five hundred seven".