12720814078 has 16 divisors (see below), whose sum is σ = 22338991584. Its totient is φ = 5318807040.

The previous prime is 12720814063. The next prime is 12720814097. The reversal of 12720814078 is 87041802721.

It is a super-2 number, since 2×12720814078² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12720814078.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11080275 + ... + 11081422.

It is an arithmetic number, because the mean of its divisors is an integer number (1396186974).

Almost surely, 2^12720814078 is an apocalyptic number.

12720814078 is a deficient number, since it is larger than the sum of its proper divisors (9618177506).

12720814078 is a wasteful number, since it uses less digits than its factorization.

12720814078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22161747.

The product of its (nonzero) digits is 50176, while the sum is 40.

The spelling of 12720814078 in words is "twelve billion, seven hundred twenty million, eight hundred fourteen thousand, seventy-eight".