2003153656656 has 120 divisors (see below), whose sum is σ = 5497682988864. Its totient is φ = 628384780800.

The previous prime is 2003153656643. The next prime is 2003153656711. The reversal of 2003153656656 is 6566563513002.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2233740 + ... + 2999316.

Almost surely, 2^{2003153656656} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2003153656656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2748841494432).

2003153656656 is an abundant number, since it is smaller than the sum of its proper divisors (3494529332208).

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

2003153656656 is a wasteful number, since it uses less digits than its factorization.

2003153656656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 765777 (or 765752 counting only the distinct ones).

The product of its (nonzero) digits is 2916000, while the sum is 48.

The spelling of 2003153656656 in words is "two trillion, three billion, one hundred fifty-three million, six hundred fifty-six thousand, six hundred fifty-six".