6719016740521 has 2 divisors, whose sum is σ = 6719016740522. Its totient is φ = 6719016740520.

The previous prime is 6719016740507. The next prime is 6719016740561. The reversal of 6719016740521 is 1250476109176.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5095227222121 + 1623789518400 = 2257261^2 + 1274280^2 .

It is a cyclic number.

It is not a de Polignac number, because 6719016740521 - 2³¹ = 6716869256873 is a prime.

It is not a weakly prime, because it can be changed into another prime (6719016740561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3359508370260 + 3359508370261.

It is an arithmetic number, because the mean of its divisors is an integer number (3359508370261).

Almost surely, 2^{6719016740521} is an apocalyptic number.

It is an amenable number.

6719016740521 is a deficient number, since it is larger than the sum of its proper divisors (1).

6719016740521 is an equidigital number, since it uses as much as digits as its factorization.

6719016740521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 635040, while the sum is 49.

The spelling of 6719016740521 in words is "six trillion, seven hundred nineteen billion, sixteen million, seven hundred forty thousand, five hundred twenty-one".