78190074901 has 2 divisors, whose sum is σ = 78190074902. Its totient is φ = 78190074900.

The previous prime is 78190074889. The next prime is 78190074929. The reversal of 78190074901 is 10947009187.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53811936676 + 24378138225 = 231974^2 + 156135^2 .

It is a cyclic number.

It is not a de Polignac number, because 78190074901 - 2⁵ = 78190074869 is a prime.

It is a super-2 number, since 2×78190074901² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78190074301) 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 as a sum of consecutive naturals, namely, 39095037450 + 39095037451.

It is an arithmetic number, because the mean of its divisors is an integer number (39095037451).

Almost surely, 2^78190074901 is an apocalyptic number.

It is an amenable number.

78190074901 is a deficient number, since it is larger than the sum of its proper divisors (1).

78190074901 is an equidigital number, since it uses as much as digits as its factorization.

78190074901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 127008, while the sum is 46.

The spelling of 78190074901 in words is "seventy-eight billion, one hundred ninety million, seventy-four thousand, nine hundred one".