78911134012 has 24 divisors (see below), whose sum is σ = 142605596672. Its totient is φ = 38167686000.

The previous prime is 78911133989. The next prime is 78911134019. The reversal of 78911134012 is 21043111987.

It is a super-2 number, since 2×78911134012² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78911134019) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 191593 + ... + 441055.

Almost surely, 2^78911134012 is an apocalyptic number.

It is an amenable number.

78911134012 is a deficient number, since it is larger than the sum of its proper divisors (63694462660).

78911134012 is a wasteful number, since it uses less digits than its factorization.

78911134012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252049 (or 252047 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 37.

Adding to 78911134012 its reverse (21043111987), we get a palindrome (99954245999).

The spelling of 78911134012 in words is "seventy-eight billion, nine hundred eleven million, one hundred thirty-four thousand, twelve".