7799120219978 has 8 divisors (see below), whose sum is σ = 11699355942372. Its totient is φ = 3899334905856.

The previous prime is 7799120219939. The next prime is 7799120219983. The reversal of 7799120219978 is 8799120219977.

It can be written as a sum of positive squares in 2 ways, for example, as 5597686279249 + 2201433940729 = 2365943^2 + 1483723^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×7799120219978² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 112558775 + ... + 112628042.

Almost surely, 2^{7799120219978} is an apocalyptic number.

7799120219978 is a deficient number, since it is larger than the sum of its proper divisors (3900235722394).

7799120219978 is a wasteful number, since it uses less digits than its factorization.

7799120219978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225204136.

The product of its (nonzero) digits is 72013536, while the sum is 71.

Subtracting 7799120219978 from its reverse (8799120219977), we obtain a palindrome (999999999999).

The spelling of 7799120219978 in words is "seven trillion, seven hundred ninety-nine billion, one hundred twenty million, two hundred nineteen thousand, nine hundred seventy-eight".