2155532736 has 224 divisors, whose sum is σ = 6759244800. Its totient is φ = 605875200.

The previous prime is 2155532723. The next prime is 2155532747. The reversal of 2155532736 is 6372355512.

It is a tau number, because it is divible by the number of its divisors (224).

It is a junction number, because it is equal to n+sod(n) for n = 2155532694 and 2155532703.

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, 4675546 + ... + 4676006.

It is an arithmetic number, because the mean of its divisors is an integer number (30175200).

Almost surely, 2^2155532736 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 2155532736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3379622400).

2155532736 is an abundant number, since it is smaller than the sum of its proper divisors (4603712064).

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

2155532736 is an equidigital number, since it uses as much as digits as its factorization.

2155532736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 568 (or 544 counting only the distinct ones).

The product of its digits is 189000, while the sum is 39.

The square root of 2155532736 is about 46427.7151710053. The cubic root of 2155532736 is about 1291.7690481696.

The spelling of 2155532736 in words is "two billion, one hundred fifty-five million, five hundred thirty-two thousand, seven hundred thirty-six".