64630245655397 has 2 divisors, whose sum is σ = 64630245655398. Its totient is φ = 64630245655396.

The previous prime is 64630245655379. The next prime is 64630245655421. The reversal of 64630245655397 is 79355654203646.

It is a happy number.

Together with previous prime (64630245655379) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64460842620001 + 169403035396 = 8028751^2 + 411586^2 .

It is a cyclic number.

It is not a de Polignac number, because 64630245655397 - 2³⁰ = 64629171913573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64630245655307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32315122827698 + 32315122827699.

It is an arithmetic number, because the mean of its divisors is an integer number (32315122827699).

Almost surely, 2^{64630245655397} is an apocalyptic number.

It is an amenable number.

64630245655397 is a deficient number, since it is larger than the sum of its proper divisors (1).

64630245655397 is an equidigital number, since it uses as much as digits as its factorization.

64630245655397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 489888000, while the sum is 65.

The spelling of 64630245655397 in words is "sixty-four trillion, six hundred thirty billion, two hundred forty-five million, six hundred fifty-five thousand, three hundred ninety-seven".