12447643523400 has 120 divisors (see below), whose sum is σ = 43232510108370. Its totient is φ = 3319371601920.

The previous prime is 12447643523369. The next prime is 12447643523461. The reversal of 12447643523400 is 432534674421.

12447643523400 is a `hidden beast` number, since 1 + 2 + 4 + 47 + 6 + 43 + 523 + 40 + 0 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 11032747547364 + 1414895976036 = 3321558^2 + 1189494^2 .

It is a tau number, because it is divible by the number of its divisors (120).

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 29 ways as a sum of consecutive naturals, for example, 384170329 + ... + 384202728.

Almost surely, 2^{12447643523400} is an apocalyptic number.

12447643523400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12447643523400 is an abundant number, since it is smaller than the sum of its proper divisors (30784866584970).

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

12447643523400 is a wasteful number, since it uses less digits than its factorization.

12447643523400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 768373085 (or 768373067 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 45.

The spelling of 12447643523400 in words is "twelve trillion, four hundred forty-seven billion, six hundred forty-three million, five hundred twenty-three thousand, four hundred".