7840464640487 has 4 divisors (see below), whose sum is σ = 7840472549400. Its totient is φ = 7840456731576.

The previous prime is 7840464640483. The next prime is 7840464640553.

7840464640487 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 7840464640487 - 2² = 7840464640483 is a prime.

It is a super-2 number, since 2×7840464640487² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7840464640483) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2211308 + ... + 4535505.

It is an arithmetic number, because the mean of its divisors is an integer number (1960118137350).

Almost surely, 2^{7840464640487} is an apocalyptic number.

7840464640487 is a deficient number, since it is larger than the sum of its proper divisors (7908913).

7840464640487 is a wasteful number, since it uses less digits than its factorization.

7840464640487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7908912.

The product of its (nonzero) digits is 115605504, while the sum is 62.

The spelling of 7840464640487 in words is "seven trillion, eight hundred forty billion, four hundred sixty-four million, six hundred forty thousand, four hundred eighty-seven".