78691288001 has 2 divisors, whose sum is σ = 78691288002. Its totient is φ = 78691288000.

The previous prime is 78691287973. The next prime is 78691288009. The reversal of 78691288001 is 10088219687.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71727552400 + 6963735601 = 267820^2 + 83449^2 .

It is a cyclic number.

It is not a de Polignac number, because 78691288001 - 2¹⁸ = 78691025857 is a prime.

It is not a weakly prime, because it can be changed into another prime (78691288009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39345644000 + 39345644001.

It is an arithmetic number, because the mean of its divisors is an integer number (39345644001).

Almost surely, 2^78691288001 is an apocalyptic number.

It is an amenable number.

78691288001 is a deficient number, since it is larger than the sum of its proper divisors (1).

78691288001 is an equidigital number, since it uses as much as digits as its factorization.

78691288001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 387072, while the sum is 50.

The spelling of 78691288001 in words is "seventy-eight billion, six hundred ninety-one million, two hundred eighty-eight thousand, one".