2153544408 has 80 divisors (see below), whose sum is σ = 6239970000. Its totient is φ = 693088704.

The previous prime is 2153544403. The next prime is 2153544409. The reversal of 2153544408 is 8044453512.

It is a happy number.

2153544408 is a `hidden beast` number, since 21 + 53 + 544 + 40 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2153544401) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 38508 + ... + 76091.

It is an arithmetic number, because the mean of its divisors is an integer number (77999625).

Almost surely, 2^2153544408 is an apocalyptic number.

It is an amenable number.

2153544408 is an abundant number, since it is smaller than the sum of its proper divisors (4086425592).

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

2153544408 is a wasteful number, since it uses less digits than its factorization.

2153544408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114646 (or 114633 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 36.

The square root of 2153544408 is about 46406.2970727034. The cubic root of 2153544408 is about 1291.3717371520.

The spelling of 2153544408 in words is "two billion, one hundred fifty-three million, five hundred forty-four thousand, four hundred eight".