12651105400 has 48 divisors (see below), whose sum is σ = 29480423400. Its totient is φ = 5048983680.

The previous prime is 12651105367. The next prime is 12651105413. The reversal of 12651105400 is 450115621.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17206 + ... + 159994.

Almost surely, 2^12651105400 is an apocalyptic number.

12651105400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12651105400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14740211700).

12651105400 is an abundant number, since it is smaller than the sum of its proper divisors (16829318000).

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

12651105400 is a wasteful number, since it uses less digits than its factorization.

12651105400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143248 (or 143239 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 25.

The spelling of 12651105400 in words is "twelve billion, six hundred fifty-one million, one hundred five thousand, four hundred".