1158909551 has 4 divisors (see below), whose sum is σ = 1159643232. Its totient is φ = 1158175872.

The previous prime is 1158909491. The next prime is 1158909569. The reversal of 1158909551 is 1559098511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1559098511 = 22613 ⋅68947.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1158909551 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1158909151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 364466 + ... + 367631.

It is an arithmetic number, because the mean of its divisors is an integer number (289910808).

Almost surely, 2^1158909551 is an apocalyptic number.

1158909551 is a deficient number, since it is larger than the sum of its proper divisors (733681).

1158909551 is an equidigital number, since it uses as much as digits as its factorization.

1158909551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 733680.

The product of its (nonzero) digits is 81000, while the sum is 44.

The square root of 1158909551 is about 34042.7606254252. The cubic root of 1158909551 is about 1050.3882316437.

The spelling of 1158909551 in words is "one billion, one hundred fifty-eight million, nine hundred nine thousand, five hundred fifty-one".