1161453553 has 8 divisors (see below), whose sum is σ = 1251102888. Its totient is φ = 1071848064.

The previous prime is 1161453551. The next prime is 1161453577. The reversal of 1161453553 is 3553541611.

It can be written as a sum of positive squares in 4 ways, for example, as 144672784 + 1016780769 = 12028^2 + 31887^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1161453553 - 2¹ = 1161453551 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1161453551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62175 + ... + 78667.

It is an arithmetic number, because the mean of its divisors is an integer number (156387861).

Almost surely, 2^1161453553 is an apocalyptic number.

1161453553 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1161453553 is a deficient number, since it is larger than the sum of its proper divisors (89649335).

1161453553 is a wasteful number, since it uses less digits than its factorization.

1161453553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21923.

The product of its digits is 27000, while the sum is 34.

The square root of 1161453553 is about 34080.1049440872. The cubic root of 1161453553 is about 1051.1562630626.

The spelling of 1161453553 in words is "one billion, one hundred sixty-one million, four hundred fifty-three thousand, five hundred fifty-three".