84786668749 has 4 divisors (see below), whose sum is σ = 85433895360. Its totient is φ = 84139442140.

The previous prime is 84786668741. The next prime is 84786668753. The reversal of 84786668749 is 94786668748.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 84786668749 - 2³ = 84786668741 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 (84786668741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 323613109 + ... + 323613370.

It is an arithmetic number, because the mean of its divisors is an integer number (21358473840).

Almost surely, 2^84786668749 is an apocalyptic number.

It is an amenable number.

84786668749 is a deficient number, since it is larger than the sum of its proper divisors (647226611).

84786668749 is a wasteful number, since it uses less digits than its factorization.

84786668749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 647226610.

The product of its digits is 780337152, while the sum is 73.

Subtracting 84786668749 from its reverse (94786668748), we obtain a palindrome (9999999999).

The spelling of 84786668749 in words is "eighty-four billion, seven hundred eighty-six million, six hundred sixty-eight thousand, seven hundred forty-nine".