1145553552 has 120 divisors (see below), whose sum is σ = 3766508928. Its totient is φ = 320428800.

The previous prime is 1145553533. The next prime is 1145553557. The reversal of 1145553552 is 2553555411.

1145553552 is a `hidden beast` number, since 1 + 1 + 4 + 55 + 53 + 552 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (1145553557) by changing a digit.

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, 7224 + ... + 48407.

Almost surely, 2^1145553552 is an apocalyptic number.

1145553552 is a gapful number since it is divisible by the number (12) 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 1145553552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1883254464).

1145553552 is an abundant number, since it is smaller than the sum of its proper divisors (2620955376).

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

1145553552 is a wasteful number, since it uses less digits than its factorization.

1145553552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55669 (or 55660 counting only the distinct ones).

The product of its digits is 75000, while the sum is 36.

The square root of 1145553552 is about 33846.0271228397. The cubic root of 1145553552 is about 1046.3375201170.

The spelling of 1145553552 in words is "one billion, one hundred forty-five million, five hundred fifty-three thousand, five hundred fifty-two".