1553005403020 has 24 divisors (see below), whose sum is σ = 3261338232768. Its totient is φ = 621197040000.

The previous prime is 1553005402981. The next prime is 1553005403069. The reversal of 1553005403020 is 203045003551.

It is a self number, because there is not a number n which added to its sum of digits gives 1553005403020.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3013245 + ... + 3490795.

It is an arithmetic number, because the mean of its divisors is an integer number (135889093032).

Almost surely, 2^{1553005403020} is an apocalyptic number.

1553005403020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1553005403020 is an abundant number, since it is smaller than the sum of its proper divisors (1708332829748).

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

1553005403020 is a wasteful number, since it uses less digits than its factorization.

1553005403020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 640161 (or 640159 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 28.

The spelling of 1553005403020 in words is "one trillion, five hundred fifty-three billion, five million, four hundred three thousand, twenty".