1555204002240 has 448 divisors, whose sum is σ = 5849566322688. Its totient is φ = 342569779200.

The previous prime is 1555204002229. The next prime is 1555204002257. The reversal of 1555204002240 is 422004025551.

It is a tau number, because it is divible by the number of its divisors (448).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 1555204002198 and 1555204002207.

It is a congruent number.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 50189632 + ... + 50220608.

Almost surely, 2^{1555204002240} is an apocalyptic number.

1555204002240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1555204002240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2924783161344).

1555204002240 is an abundant number, since it is smaller than the sum of its proper divisors (4294362320448).

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

1555204002240 is a wasteful number, since it uses less digits than its factorization.

1555204002240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31276 (or 31266 counting only the distinct ones).

The product of its (nonzero) digits is 16000, while the sum is 30.

Adding to 1555204002240 its reverse (422004025551), we get a palindrome (1977208027791).

The spelling of 1555204002240 in words is "one trillion, five hundred fifty-five billion, two hundred four million, two thousand, two hundred forty".