12978319152 has 40 divisors (see below), whose sum is σ = 34027740736. Its totient is φ = 4261536576.

The previous prime is 12978319091. The next prime is 12978319169. The reversal of 12978319152 is 25191387921.

It is a happy number.

It is a super-2 number, since 2×12978319152² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

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, 2014558 + ... + 2020989.

Almost surely, 2^12978319152 is an apocalyptic number.

12978319152 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12978319152 is an abundant number, since it is smaller than the sum of its proper divisors (21049421584).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12978319152 is a wasteful number, since it uses less digits than its factorization.

12978319152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4035625 (or 4035619 counting only the distinct ones).

The product of its digits is 272160, while the sum is 48.

The spelling of 12978319152 in words is "twelve billion, nine hundred seventy-eight million, three hundred nineteen thousand, one hundred fifty-two".