7947860687497 has 8 divisors (see below), whose sum is σ = 7985139755400. Its totient is φ = 7910643393024.

The previous prime is 7947860687479. The next prime is 7947860687509.

7947860687497 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 4 ways, for example, as 315986176 + 7947544701321 = 17776^2 + 2819139^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 7947860687497 - 2¹⁵ = 7947860654729 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7947860687497.

It is not an unprimeable number, because it can be changed into a prime (7947860687447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15185422 + ... + 15700087.

It is an arithmetic number, because the mean of its divisors is an integer number (998142469425).

Almost surely, 2^{7947860687497} is an apocalyptic number.

It is an amenable number.

7947860687497 is a deficient number, since it is larger than the sum of its proper divisors (37279067903).

7947860687497 is a wasteful number, since it uses less digits than its factorization.

7947860687497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30886715.

The product of its (nonzero) digits is 7169347584, while the sum is 82.

The spelling of 7947860687497 in words is "seven trillion, nine hundred forty-seven billion, eight hundred sixty million, six hundred eighty-seven thousand, four hundred ninety-seven".