7897836387987 has 48 divisors (see below), whose sum is σ = 14124673704960. Its totient is φ = 4140946190016.

The previous prime is 7897836387983. The next prime is 7897836388019.

7897836387987 is a `hidden beast` number, since 7 + 8 + 97 + 8 + 363 + 87 + 9 + 87 = 666.

7897836387987 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 7897836387987 - 2² = 7897836387983 is a prime.

It is a super-2 number, since 2×7897836387987² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 7897836387897 and 7897836387906.

It is not an unprimeable number, because it can be changed into a prime (7897836387983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 28735287 + ... + 29008832.

It is an arithmetic number, because the mean of its divisors is an integer number (294264035520).

Almost surely, 2^{7897836387987} is an apocalyptic number.

7897836387987 is a deficient number, since it is larger than the sum of its proper divisors (6226837316973).

7897836387987 is a wasteful number, since it uses less digits than its factorization.

7897836387987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57744312 (or 57744309 counting only the distinct ones).

The product of its digits is 43016085504, while the sum is 90.

The spelling of 7897836387987 in words is "seven trillion, eight hundred ninety-seven billion, eight hundred thirty-six million, three hundred eighty-seven thousand, nine hundred eighty-seven".