1550404440444 has 12 divisors (see below), whose sum is σ = 3617610361064. Its totient is φ = 516801480144.

The previous prime is 1550404440443. The next prime is 1550404440449. The reversal of 1550404440444 is 4440444040551.

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1550404440443) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 64600185007 + ... + 64600185030.

Almost surely, 2^{1550404440444} is an apocalyptic number.

It is an amenable number.

1550404440444 is an abundant number, since it is smaller than the sum of its proper divisors (2067205920620).

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

1550404440444 is a wasteful number, since it uses less digits than its factorization.

1550404440444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129200370044 (or 129200370042 counting only the distinct ones).

The product of its (nonzero) digits is 409600, while the sum is 39.

Adding to 1550404440444 its reverse (4440444040551), we get a palindrome (5990848480995).

The spelling of 1550404440444 in words is "one trillion, five hundred fifty billion, four hundred four million, four hundred forty thousand, four hundred forty-four".