7788906321449 has 16 divisors (see below), whose sum is σ = 8944292474880. Its totient is φ = 6708078614160.

The previous prime is 7788906321439. The next prime is 7788906321451. The reversal of 7788906321449 is 9441236098877.

It is a de Polignac number, because none of the positive numbers 2^k-7788906321449 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7788906321439) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34323212 + ... + 34549394.

It is an arithmetic number, because the mean of its divisors is an integer number (559018279680).

Almost surely, 2^{7788906321449} is an apocalyptic number.

It is an amenable number.

7788906321449 is a deficient number, since it is larger than the sum of its proper divisors (1155386153431).

7788906321449 is a wasteful number, since it uses less digits than its factorization.

7788906321449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390980.

The product of its (nonzero) digits is 146313216, while the sum is 68.

The spelling of 7788906321449 in words is "seven trillion, seven hundred eighty-eight billion, nine hundred six million, three hundred twenty-one thousand, four hundred forty-nine".