1553121136404 has 24 divisors (see below), whose sum is σ = 4026610353920. Its totient is φ = 517707045432.

The previous prime is 1553121136387. The next prime is 1553121136417. The reversal of 1553121136404 is 4046311213551.

1553121136404 is a `hidden beast` number, since 1 + 5 + 5 + 3 + 1 + 2 + 1 + 1 + 3 + 640 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7190375524 + ... + 7190375739.

Almost surely, 2^{1553121136404} is an apocalyptic number.

It is an amenable number.

1553121136404 is an abundant number, since it is smaller than the sum of its proper divisors (2473489217516).

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

1553121136404 is a wasteful number, since it uses less digits than its factorization.

1553121136404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14380751276 (or 14380751268 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

Adding to 1553121136404 its reverse (4046311213551), we get a palindrome (5599432349955).

The spelling of 1553121136404 in words is "one trillion, five hundred fifty-three billion, one hundred twenty-one million, one hundred thirty-six thousand, four hundred four".