1157163161 has 16 divisors (see below), whose sum is σ = 1456990848. Its totient is φ = 892752000.

The previous prime is 1157163121. The next prime is 1157163199. The reversal of 1157163161 is 1613617511.

It is not a de Polignac number, because 1157163161 - 2²² = 1152968857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1157163101) 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, 66620 + ... + 82173.

It is an arithmetic number, because the mean of its divisors is an integer number (91061928).

Almost surely, 2^1157163161 is an apocalyptic number.

1157163161 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1157163161 is a deficient number, since it is larger than the sum of its proper divisors (299827687).

1157163161 is a wasteful number, since it uses less digits than its factorization.

1157163161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148912.

The product of its digits is 3780, while the sum is 32.

The square root of 1157163161 is about 34017.1010081694. The cubic root of 1157163161 is about 1049.8603475643.

The spelling of 1157163161 in words is "one billion, one hundred fifty-seven million, one hundred sixty-three thousand, one hundred sixty-one".