793016921561 has 2 divisors, whose sum is σ = 793016921562. Its totient is φ = 793016921560.

The previous prime is 793016921491. The next prime is 793016921563. The reversal of 793016921561 is 165129610397.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 502991589961 + 290025331600 = 709219^2 + 538540^2 .

It is a cyclic number.

It is not a de Polignac number, because 793016921561 - 2²² = 793012727257 is a prime.

Together with 793016921563, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (793016921563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 396508460780 + 396508460781.

It is an arithmetic number, because the mean of its divisors is an integer number (396508460781).

Almost surely, 2^793016921561 is an apocalyptic number.

It is an amenable number.

793016921561 is a deficient number, since it is larger than the sum of its proper divisors (1).

793016921561 is an equidigital number, since it uses as much as digits as its factorization.

793016921561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 612360, while the sum is 50.

The spelling of 793016921561 in words is "seven hundred ninety-three billion, sixteen million, nine hundred twenty-one thousand, five hundred sixty-one".