12998051478 has 64 divisors (see below), whose sum is σ = 29037496320. Its totient is φ = 4309816896.

The previous prime is 12998051441. The next prime is 12998051483. The reversal of 12998051478 is 87415089921.

It is a happy number.

12998051478 is a `hidden beast` number, since 1 + 2 + 99 + 80 + 5 + 1 + 478 = 666.

12998051478 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12227175 + ... + 12228237.

It is an arithmetic number, because the mean of its divisors is an integer number (453710880).

Almost surely, 2^12998051478 is an apocalyptic number.

12998051478 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

12998051478 is an abundant number, since it is smaller than the sum of its proper divisors (16039444842).

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

12998051478 is a wasteful number, since it uses less digits than its factorization.

12998051478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2058 (or 2052 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 54.

The spelling of 12998051478 in words is "twelve billion, nine hundred ninety-eight million, fifty-one thousand, four hundred seventy-eight".