1161510993 has 24 divisors (see below), whose sum is σ = 1752316800. Its totient is φ = 740630304.

The previous prime is 1161510991. The next prime is 1161510997. The reversal of 1161510993 is 3990151611.

It is a happy number.

It is not a de Polignac number, because 1161510993 - 2¹ = 1161510991 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1161510991) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9913 + ... + 49206.

It is an arithmetic number, because the mean of its divisors is an integer number (73013200).

Almost surely, 2^1161510993 is an apocalyptic number.

It is an amenable number.

1161510993 is a deficient number, since it is larger than the sum of its proper divisors (590805807).

1161510993 is a wasteful number, since it uses less digits than its factorization.

1161510993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59221 (or 59218 counting only the distinct ones).

The product of its (nonzero) digits is 7290, while the sum is 36.

The square root of 1161510993 is about 34080.9476540779. The cubic root of 1161510993 is about 1051.1735911829.

The spelling of 1161510993 in words is "one billion, one hundred sixty-one million, five hundred ten thousand, nine hundred ninety-three".