1970817078251 has 6 divisors (see below), whose sum is σ = 2292583131900. Its totient is φ = 1689271781316.

The previous prime is 1970817078233. The next prime is 1970817078259. The reversal of 1970817078251 is 1528707180791.

It is not a de Polignac number, because 1970817078251 - 2¹⁰ = 1970817077227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1970817078259) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 20110378301 + ... + 20110378398.

It is an arithmetic number, because the mean of its divisors is an integer number (382097188650).

Almost surely, 2^{1970817078251} is an apocalyptic number.

1970817078251 is a deficient number, since it is larger than the sum of its proper divisors (321766053649).

1970817078251 is an equidigital number, since it uses as much as digits as its factorization.

1970817078251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40220756713 (or 40220756706 counting only the distinct ones).

The product of its (nonzero) digits is 1975680, while the sum is 56.

The spelling of 1970817078251 in words is "one trillion, nine hundred seventy billion, eight hundred seventeen million, seventy-eight thousand, two hundred fifty-one".