7980580658021 has 2 divisors, whose sum is σ = 7980580658022. Its totient is φ = 7980580658020.

The previous prime is 7980580657943. The next prime is 7980580658023. The reversal of 7980580658021 is 1208560850897.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5620550392900 + 2360030265121 = 2370770^2 + 1536239^2 .

It is a cyclic number.

It is not a de Polignac number, because 7980580658021 - 2¹⁴ = 7980580641637 is a prime.

Together with 7980580658023, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7980580658023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3990290329010 + 3990290329011.

It is an arithmetic number, because the mean of its divisors is an integer number (3990290329011).

Almost surely, 2^{7980580658021} is an apocalyptic number.

It is an amenable number.

7980580658021 is a deficient number, since it is larger than the sum of its proper divisors (1).

7980580658021 is an equidigital number, since it uses as much as digits as its factorization.

7980580658021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9676800, while the sum is 59.

The spelling of 7980580658021 in words is "seven trillion, nine hundred eighty billion, five hundred eighty million, six hundred fifty-eight thousand, twenty-one".