1165156455 has 32 divisors (see below), whose sum is σ = 2027277504. Its totient is φ = 569051136.

The previous prime is 1165156453. The next prime is 1165156463. The reversal of 1165156455 is 5546515611.

It is not a de Polignac number, because 1165156455 - 2¹ = 1165156453 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1165156451) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 52312 + ... + 71181.

It is an arithmetic number, because the mean of its divisors is an integer number (63352422).

Almost surely, 2^1165156455 is an apocalyptic number.

1165156455 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1165156455 is a deficient number, since it is larger than the sum of its proper divisors (862121049).

1165156455 is a wasteful number, since it uses less digits than its factorization.

1165156455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123555.

The product of its digits is 90000, while the sum is 39.

The square root of 1165156455 is about 34134.3881591570. The cubic root of 1165156455 is about 1052.2721634709.

It can be divided in two parts, 1165156 and 455, that added together give a palindrome (1165611).

The spelling of 1165156455 in words is "one billion, one hundred sixty-five million, one hundred fifty-six thousand, four hundred fifty-five".