34720178821 has 2 divisors, whose sum is σ = 34720178822. Its totient is φ = 34720178820.

The previous prime is 34720178761. The next prime is 34720178833. The reversal of 34720178821 is 12887102743.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 33621256321 + 1098922500 = 183361^2 + 33150^2 .

It is a cyclic number.

It is not a de Polignac number, because 34720178821 - 2²⁷ = 34585961093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (34720178861) 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, 17360089410 + 17360089411.

It is an arithmetic number, because the mean of its divisors is an integer number (17360089411).

Almost surely, 2^34720178821 is an apocalyptic number.

It is an amenable number.

34720178821 is a deficient number, since it is larger than the sum of its proper divisors (1).

34720178821 is an equidigital number, since it uses as much as digits as its factorization.

34720178821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 150528, while the sum is 43.

The spelling of 34720178821 in words is "thirty-four billion, seven hundred twenty million, one hundred seventy-eight thousand, eight hundred twenty-one".