12778950600 has 144 divisors (see below), whose sum is σ = 46217289300. Its totient is φ = 3145582080.

The previous prime is 12778950589. The next prime is 12778950619. The reversal of 12778950600 is 605987721.

It can be written as a sum of positive squares in 6 ways, for example, as 1144739556 + 11634211044 = 33834^2 + 107862^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 249655 + ... + 296454.

Almost surely, 2^12778950600 is an apocalyptic number.

12778950600 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12778950600 is an abundant number, since it is smaller than the sum of its proper divisors (33438338700).

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

12778950600 is a wasteful number, since it uses less digits than its factorization.

12778950600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 546144 (or 546132 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 45.

The spelling of 12778950600 in words is "twelve billion, seven hundred seventy-eight million, nine hundred fifty thousand, six hundred".