34377676780021 has 2 divisors, whose sum is σ = 34377676780022. Its totient is φ = 34377676780020.

The previous prime is 34377676780003. The next prime is 34377676780037. The reversal of 34377676780021 is 12008767677343.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30598875140625 + 3778801639396 = 5531625^2 + 1943914^2 .

It is an emirp because it is prime and its reverse (12008767677343) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 34377676780021 - 2⁵ = 34377676779989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (34377676780921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17188838390010 + 17188838390011.

It is an arithmetic number, because the mean of its divisors is an integer number (17188838390011).

Almost surely, 2^{34377676780021} is an apocalyptic number.

It is an amenable number.

34377676780021 is a deficient number, since it is larger than the sum of its proper divisors (1).

34377676780021 is an equidigital number, since it uses as much as digits as its factorization.

34377676780021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 49787136, while the sum is 61.

The spelling of 34377676780021 in words is "thirty-four trillion, three hundred seventy-seven billion, six hundred seventy-six million, seven hundred eighty thousand, twenty-one".