78831345779152 has 10 divisors (see below), whose sum is σ = 152735732447138. Its totient is φ = 39415672889568.

The previous prime is 78831345779111. The next prime is 78831345779171. The reversal of 78831345779152 is 25197754313887.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 59168648557456 + 19662697221696 = 7692116^2 + 4434264^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2463479555583 + ... + 2463479555614.

Almost surely, 2^{78831345779152} is an apocalyptic number.

It is an amenable number.

78831345779152 is a deficient number, since it is larger than the sum of its proper divisors (73904386667986).

78831345779152 is a wasteful number, since it uses less digits than its factorization.

78831345779152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4926959111205 (or 4926959111199 counting only the distinct ones).

The product of its digits is 355622400, while the sum is 70.

The spelling of 78831345779152 in words is "seventy-eight trillion, eight hundred thirty-one billion, three hundred forty-five million, seven hundred seventy-nine thousand, one hundred fifty-two".