1153453644 has 72 divisors (see below), whose sum is σ = 3337615008. Its totient is φ = 329022720.

The previous prime is 1153453603. The next prime is 1153453663. The reversal of 1153453644 is 4463543511.

1153453644 is a `hidden beast` number, since 1 + 1 + 5 + 3 + 4 + 5 + 3 + 644 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 1153453599 and 1153453608.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 167224 + ... + 173984.

It is an arithmetic number, because the mean of its divisors is an integer number (46355764).

Almost surely, 2^1153453644 is an apocalyptic number.

1153453644 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1153453644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1668807504).

1153453644 is an abundant number, since it is smaller than the sum of its proper divisors (2184161364).

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

1153453644 is a wasteful number, since it uses less digits than its factorization.

1153453644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7455 (or 7450 counting only the distinct ones).

The product of its digits is 86400, while the sum is 36.

The square root of 1153453644 is about 33962.5329444080. The cubic root of 1153453644 is about 1048.7373011722.

The spelling of 1153453644 in words is "one billion, one hundred fifty-three million, four hundred fifty-three thousand, six hundred forty-four".