12978773512072 has 32 divisors (see below), whose sum is σ = 25820475494400. Its totient is φ = 6094907240704.

The previous prime is 12978773512057. The next prime is 12978773512109. The reversal of 12978773512072 is 27021537787921.

It is a self number, because there is not a number n which added to its sum of digits gives 12978773512072.

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, 99550888 + ... + 99681175.

It is an arithmetic number, because the mean of its divisors is an integer number (806889859200).

Almost surely, 2^{12978773512072} is an apocalyptic number.

It is an amenable number.

12978773512072 is a deficient number, since it is larger than the sum of its proper divisors (12841701982328).

12978773512072 is a wasteful number, since it uses less digits than its factorization.

12978773512072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199232565 (or 199232561 counting only the distinct ones).

The product of its (nonzero) digits is 20744640, while the sum is 61.

The spelling of 12978773512072 in words is "twelve trillion, nine hundred seventy-eight billion, seven hundred seventy-three million, five hundred twelve thousand, seventy-two".