1165378953 has 16 divisors (see below), whose sum is σ = 1586848832. Its totient is φ = 760536000.

The previous prime is 1165378943. The next prime is 1165379009. The reversal of 1165378953 is 3598735611.

It is a de Polignac number, because none of the positive numbers 2^k-1165378953 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1165378943) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23523 + ... + 53703.

It is an arithmetic number, because the mean of its divisors is an integer number (99178052).

Almost surely, 2^1165378953 is an apocalyptic number.

It is an amenable number.

1165378953 is a deficient number, since it is larger than the sum of its proper divisors (421469879).

1165378953 is a wasteful number, since it uses less digits than its factorization.

1165378953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30456.

The product of its digits is 680400, while the sum is 48.

The square root of 1165378953 is about 34137.6471509095. The cubic root of 1165378953 is about 1052.3391397553.

The spelling of 1165378953 in words is "one billion, one hundred sixty-five million, three hundred seventy-eight thousand, nine hundred fifty-three".