7489772779847 has 4 divisors (see below), whose sum is σ = 7490068271400. Its totient is φ = 7489477288296.

The previous prime is 7489772779777. The next prime is 7489772779933.

7489772779847 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7489772779847 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7489772779747) 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, 147707753 + ... + 147758450.

It is an arithmetic number, because the mean of its divisors is an integer number (1872517067850).

Almost surely, 2^{7489772779847} is an apocalyptic number.

7489772779847 is a deficient number, since it is larger than the sum of its proper divisors (295491553).

7489772779847 is a wasteful number, since it uses less digits than its factorization.

7489772779847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295491552.

The product of its digits is 19516557312, while the sum is 86.

The spelling of 7489772779847 in words is "seven trillion, four hundred eighty-nine billion, seven hundred seventy-two million, seven hundred seventy-nine thousand, eight hundred forty-seven".