7955838221908 has 6 divisors (see below), whose sum is σ = 13922716888346. Its totient is φ = 3977919110952.

The previous prime is 7955838221857. The next prime is 7955838221909. The reversal of 7955838221908 is 8091228385597.

It can be written as a sum of positive squares in only one way, i.e., 6284708052624 + 1671130169284 = 2506932^2 + 1292722^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7955838221909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 994479777735 + ... + 994479777742.

Almost surely, 2^{7955838221908} is an apocalyptic number.

It is an amenable number.

7955838221908 is a deficient number, since it is larger than the sum of its proper divisors (5966878666438).

7955838221908 is a wasteful number, since it uses less digits than its factorization.

7955838221908 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1988959555481 (or 1988959555479 counting only the distinct ones).

The product of its (nonzero) digits is 87091200, while the sum is 67.

The spelling of 7955838221908 in words is "seven trillion, nine hundred fifty-five billion, eight hundred thirty-eight million, two hundred twenty-one thousand, nine hundred eight".