78181083501701 has 2 divisors, whose sum is σ = 78181083501702. Its totient is φ = 78181083501700.

The previous prime is 78181083501691. The next prime is 78181083501713. The reversal of 78181083501701 is 10710538018187.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70778064220900 + 7403019280801 = 8412970^2 + 2720849^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78181083501701 is a prime.

It is a super-2 number, since 2×78181083501701² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78181083501701.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78181083504701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39090541750850 + 39090541750851.

It is an arithmetic number, because the mean of its divisors is an integer number (39090541750851).

Almost surely, 2^{78181083501701} is an apocalyptic number.

It is an amenable number.

78181083501701 is a deficient number, since it is larger than the sum of its proper divisors (1).

78181083501701 is an equidigital number, since it uses as much as digits as its factorization.

78181083501701 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 376320, while the sum is 50.

The spelling of 78181083501701 in words is "seventy-eight trillion, one hundred eighty-one billion, eighty-three million, five hundred one thousand, seven hundred one".