1554421110444 has 72 divisors (see below), whose sum is σ = 4010049847440. Its totient is φ = 507545472000.

The previous prime is 1554421110439. The next prime is 1554421110449. The reversal of 1554421110444 is 4440111244551.

1554421110444 is a `hidden beast` number, since 1 + 5 + 544 + 2 + 1 + 1 + 104 + 4 + 4 = 666.

It is an interprime number because it is at equal distance from previous prime (1554421110439) and next prime (1554421110449).

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

It is a junction number, because it is equal to n+sod(n) for n = 1554421110399 and 1554421110408.

It is not an unprimeable number, because it can be changed into a prime (1554421110449) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 705357 + ... + 1899044.

It is an arithmetic number, because the mean of its divisors is an integer number (55695136770).

Almost surely, 2^{1554421110444} is an apocalyptic number.

It is an amenable number.

1554421110444 is an abundant number, since it is smaller than the sum of its proper divisors (2455628736996).

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

1554421110444 is a wasteful number, since it uses less digits than its factorization.

1554421110444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2604751 (or 2604746 counting only the distinct ones).

The product of its (nonzero) digits is 51200, while the sum is 36.

Adding to 1554421110444 its reverse (4440111244551), we get a palindrome (5994532354995).

The spelling of 1554421110444 in words is "one trillion, five hundred fifty-four billion, four hundred twenty-one million, one hundred ten thousand, four hundred forty-four".