12978845460 has 120 divisors (see below), whose sum is σ = 46531605120. Its totient is φ = 2966590656.

The previous prime is 12978845443. The next prime is 12978845501. The reversal of 12978845460 is 6454887921.

It is a happy number.

12978845460 is a `hidden beast` number, since 1 + 2 + 97 + 8 + 8 + 4 + 546 + 0 = 666.

It is a super-2 number, since 2×12978845460² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 12978845397 and 12978845406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 560920 + ... + 583599.

It is an arithmetic number, because the mean of its divisors is an integer number (387763376).

Almost surely, 2^12978845460 is an apocalyptic number.

12978845460 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12978845460 is an abundant number, since it is smaller than the sum of its proper divisors (33552759660).

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

12978845460 is a wasteful number, since it uses less digits than its factorization.

12978845460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1144547 (or 1144536 counting only the distinct ones).

The product of its (nonzero) digits is 3870720, while the sum is 54.

The spelling of 12978845460 in words is "twelve billion, nine hundred seventy-eight million, eight hundred forty-five thousand, four hundred sixty".