1553543512120 has 48 divisors (see below), whose sum is σ = 3535189891560. Its totient is φ = 614435061504.

The previous prime is 1553543512111. The next prime is 1553543512123. The reversal of 1553543512120 is 212153453551.

It is a self number, because there is not a number n which added to its sum of digits gives 1553543512120.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1553543512123) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2134782 + ... + 2768461.

Almost surely, 2^{1553543512120} is an apocalyptic number.

1553543512120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1553543512120 is an abundant number, since it is smaller than the sum of its proper divisors (1981646379440).

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

1553543512120 is an equidigital number, since it uses as much as digits as its factorization.

1553543512120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4903432 (or 4903339 counting only the distinct ones).

The product of its (nonzero) digits is 90000, while the sum is 37.

Adding to 1553543512120 its reverse (212153453551), we get a palindrome (1765696965671).

The spelling of 1553543512120 in words is "one trillion, five hundred fifty-three billion, five hundred forty-three million, five hundred twelve thousand, one hundred twenty".