1165988541 has 16 divisors (see below), whose sum is σ = 1573035840. Its totient is φ = 768163200.

The previous prime is 1165988533. The next prime is 1165988557. The reversal of 1165988541 is 1458895611.

It is not a de Polignac number, because 1165988541 - 2³ = 1165988533 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1165988521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 169026 + ... + 175788.

It is an arithmetic number, because the mean of its divisors is an integer number (98314740).

Almost surely, 2^1165988541 is an apocalyptic number.

It is an amenable number.

1165988541 is a deficient number, since it is larger than the sum of its proper divisors (407047299).

1165988541 is a wasteful number, since it uses less digits than its factorization.

1165988541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7436.

The product of its digits is 345600, while the sum is 48.

The square root of 1165988541 is about 34146.5743669845. The cubic root of 1165988541 is about 1052.5225940990.

The spelling of 1165988541 in words is "one billion, one hundred sixty-five million, nine hundred eighty-eight thousand, five hundred forty-one".