1213450553403 has 32 divisors (see below), whose sum is σ = 1993281945600. Its totient is φ = 723368426400.

The previous prime is 1213450553377. The next prime is 1213450553453. The reversal of 1213450553403 is 3043550543121.

1213450553403 is a `hidden beast` number, since 1 + 2 + 13 + 4 + 50 + 553 + 40 + 3 = 666.

It is not a de Polignac number, because 1213450553403 - 2⁹ = 1213450552891 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1213450553453) by changing a digit.

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, 33471163 + ... + 33507396.

It is an arithmetic number, because the mean of its divisors is an integer number (62290060800).

Almost surely, 2^{1213450553403} is an apocalyptic number.

1213450553403 is a deficient number, since it is larger than the sum of its proper divisors (779831392197).

1213450553403 is a wasteful number, since it uses less digits than its factorization.

1213450553403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66978640 (or 66978634 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 36.

The spelling of 1213450553403 in words is "one trillion, two hundred thirteen billion, four hundred fifty million, five hundred fifty-three thousand, four hundred three".