7800448904818 has 4 divisors (see below), whose sum is σ = 11700673357230. Its totient is φ = 3900224452408.

The previous prime is 7800448904813. The next prime is 7800448904849. The reversal of 7800448904818 is 8184098440087.

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

It can be written as a sum of positive squares in only one way, i.e., 7624650670729 + 175798234089 = 2761277^2 + 419283^2 .

It is a super-2 number, since 2×7800448904818² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7800448904813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1950112226203 + ... + 1950112226206.

Almost surely, 2^{7800448904818} is an apocalyptic number.

7800448904818 is a deficient number, since it is larger than the sum of its proper divisors (3900224452412).

7800448904818 is a wasteful number, since it uses less digits than its factorization.

7800448904818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3900224452411.

The product of its (nonzero) digits is 16515072, while the sum is 61.

The spelling of 7800448904818 in words is "seven trillion, eight hundred billion, four hundred forty-eight million, nine hundred four thousand, eight hundred eighteen".