78663236230657 has 16 divisors (see below), whose sum is σ = 85224385975680. Its totient is φ = 72175313548800.

The previous prime is 78663236230639. The next prime is 78663236230679. The reversal of 78663236230657 is 75603263236687.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78663236230657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78663236230057) 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 in 15 ways as a sum of consecutive naturals, for example, 1936144 + ... + 12691537.

It is an arithmetic number, because the mean of its divisors is an integer number (5326524123480).

Almost surely, 2^{78663236230657} is an apocalyptic number.

It is an amenable number.

78663236230657 is a deficient number, since it is larger than the sum of its proper divisors (6561149745023).

78663236230657 is a wasteful number, since it uses less digits than its factorization.

78663236230657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14630184.

The product of its (nonzero) digits is 274337280, while the sum is 64.

The spelling of 78663236230657 in words is "seventy-eight trillion, six hundred sixty-three billion, two hundred thirty-six million, two hundred thirty thousand, six hundred fifty-seven".