1153553445 has 144 divisors (see below), whose sum is σ = 2406635712. Its totient is φ = 505128960.

The previous prime is 1153553419. The next prime is 1153553483. The reversal of 1153553445 is 5443553511.

1153553445 is a `hidden beast` number, since 11 + 53 + 553 + 4 + 45 = 666.

It is not a de Polignac number, because 1153553445 - 2⁵ = 1153553413 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 7076934 + ... + 7077096.

It is an arithmetic number, because the mean of its divisors is an integer number (16712748).

Almost surely, 2^1153553445 is an apocalyptic number.

1153553445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1153553445 is an abundant number, since it is smaller than the sum of its proper divisors (1253082267).

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

1153553445 is a wasteful number, since it uses less digits than its factorization.

1153553445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260 (or 228 counting only the distinct ones).

The product of its digits is 90000, while the sum is 36.

The square root of 1153553445 is about 33964.0021934989. The cubic root of 1153553445 is about 1048.7675471537.

It can be divided in two parts, 11535 and 53445, that added together give a triangular number (64980 = T₃₆₀).

The spelling of 1153553445 in words is "one billion, one hundred fifty-three million, five hundred fifty-three thousand, four hundred forty-five".