2153434368 has 72 divisors (see below), whose sum is σ = 5738309248. Its totient is φ = 716931072.

The previous prime is 2153434357. The next prime is 2153434399. The reversal of 2153434368 is 8634343512.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a congruent number.

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, 1018080 + ... + 1020192.

Almost surely, 2^2153434368 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 2153434368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2869154624).

2153434368 is an abundant number, since it is smaller than the sum of its proper divisors (3584874880).

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

2153434368 is a wasteful number, since it uses less digits than its factorization.

2153434368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3459 (or 3445 counting only the distinct ones).

The product of its digits is 207360, while the sum is 39.

The square root of 2153434368 is about 46405.1114425986. Note that the first 3 decimals coincide. The cubic root of 2153434368 is about 1291.3497416352.

The spelling of 2153434368 in words is "two billion, one hundred fifty-three million, four hundred thirty-four thousand, three hundred sixty-eight".