1791197046451 has 2 divisors, whose sum is σ = 1791197046452. Its totient is φ = 1791197046450.

The previous prime is 1791197046449. The next prime is 1791197046503. The reversal of 1791197046451 is 1546407911971.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1791197046451 - 2¹ = 1791197046449 is a prime.

Together with 1791197046449, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 1791197046392 and 1791197046401.

It is not a weakly prime, because it can be changed into another prime (1791197016451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 895598523225 + 895598523226.

It is an arithmetic number, because the mean of its divisors is an integer number (895598523226).

Almost surely, 2^{1791197046451} is an apocalyptic number.

1791197046451 is a deficient number, since it is larger than the sum of its proper divisors (1).

1791197046451 is an equidigital number, since it uses as much as digits as its factorization.

1791197046451 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1905120, while the sum is 55.

The spelling of 1791197046451 in words is "one trillion, seven hundred ninety-one billion, one hundred ninety-seven million, forty-six thousand, four hundred fifty-one".