1165808457 has 40 divisors (see below), whose sum is σ = 1916814240. Its totient is φ = 700237440.

The previous prime is 1165808443. The next prime is 1165808477. The reversal of 1165808457 is 7548085611.

1165808457 is a `hidden beast` number, since 1 + 16 + 580 + 8 + 4 + 57 = 666.

It is not a de Polignac number, because 1165808457 - 2¹² = 1165804361 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1165808407) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 94894 + ... + 106472.

It is an arithmetic number, because the mean of its divisors is an integer number (47920356).

Almost surely, 2^1165808457 is an apocalyptic number.

It is an amenable number.

1165808457 is a deficient number, since it is larger than the sum of its proper divisors (751005783).

1165808457 is a wasteful number, since it uses less digits than its factorization.

1165808457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11715 (or 11706 counting only the distinct ones).

The product of its (nonzero) digits is 268800, while the sum is 45.

The square root of 1165808457 is about 34143.9373388600. The cubic root of 1165808457 is about 1052.4684048192.

The spelling of 1165808457 in words is "one billion, one hundred sixty-five million, eight hundred eight thousand, four hundred fifty-seven".