6973402961521 has 2 divisors, whose sum is σ = 6973402961522. Its totient is φ = 6973402961520.

The previous prime is 6973402961513. The next prime is 6973402961537. The reversal of 6973402961521 is 1251692043796.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5967584522496 + 1005818439025 = 2442864^2 + 1002905^2 .

It is a cyclic number.

It is not a de Polignac number, because 6973402961521 - 2³ = 6973402961513 is a prime.

It is not a weakly prime, because it can be changed into another prime (6973402961221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3486701480760 + 3486701480761.

It is an arithmetic number, because the mean of its divisors is an integer number (3486701480761).

Almost surely, 2^{6973402961521} is an apocalyptic number.

It is an amenable number.

6973402961521 is a deficient number, since it is larger than the sum of its proper divisors (1).

6973402961521 is an equidigital number, since it uses as much as digits as its factorization.

6973402961521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4898880, while the sum is 55.

The spelling of 6973402961521 in words is "six trillion, nine hundred seventy-three billion, four hundred two million, nine hundred sixty-one thousand, five hundred twenty-one".