7971854581797 has 8 divisors (see below), whose sum is σ = 10632359431200. Its totient is φ = 5312959726800.

The previous prime is 7971854581793. The next prime is 7971854581807.

7971854581797 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 7971854581797 - 2² = 7971854581793 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7971854581793) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 402487047 + ... + 402506852.

It is an arithmetic number, because the mean of its divisors is an integer number (1329044928900).

Almost surely, 2^{7971854581797} is an apocalyptic number.

It is an amenable number.

7971854581797 is a deficient number, since it is larger than the sum of its proper divisors (2660504849403).

7971854581797 is a wasteful number, since it uses less digits than its factorization.

7971854581797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 804997203.

The product of its digits is 1244678400, while the sum is 78.

The spelling of 7971854581797 in words is "seven trillion, nine hundred seventy-one billion, eight hundred fifty-four million, five hundred eighty-one thousand, seven hundred ninety-seven".