1553004405020 has 96 divisors (see below), whose sum is σ = 3376608016320. Its totient is φ = 599579688960.

The previous prime is 1553004405011. The next prime is 1553004405067. The reversal of 1553004405020 is 205044003551.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 67460552 + ... + 67483568.

It is an arithmetic number, because the mean of its divisors is an integer number (35173000170).

Almost surely, 2^{1553004405020} is an apocalyptic number.

1553004405020 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 1553004405020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1688304008160).

1553004405020 is an abundant number, since it is smaller than the sum of its proper divisors (1823603611300).

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

1553004405020 is a wasteful number, since it uses less digits than its factorization.

1553004405020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23943 (or 23941 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 29.

Adding to 1553004405020 its reverse (205044003551), we get a palindrome (1758048408571).

The spelling of 1553004405020 in words is "one trillion, five hundred fifty-three billion, four million, four hundred five thousand, twenty".