1026555165 has 48 divisors (see below), whose sum is σ = 1806055680. Its totient is φ = 539343360.

The previous prime is 1026555163. The next prime is 1026555181. The reversal of 1026555165 is 5615556201.

It is not a de Polignac number, because 1026555165 - 2¹ = 1026555163 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1026555163) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1116576 + ... + 1117494.

It is an arithmetic number, because the mean of its divisors is an integer number (37626160).

Almost surely, 2^1026555165 is an apocalyptic number.

1026555165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1026555165 is a deficient number, since it is larger than the sum of its proper divisors (779500515).

1026555165 is a wasteful number, since it uses less digits than its factorization.

1026555165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1274 (or 1271 counting only the distinct ones).

The product of its (nonzero) digits is 45000, while the sum is 36.

The square root of 1026555165 is about 32039.8995784943. The cubic root of 1026555165 is about 1008.7745045479.

It can be divided in two parts, 10265551 and 65, that added together give a square (10265616 = 3204²).

The spelling of 1026555165 in words is "one billion, twenty-six million, five hundred fifty-five thousand, one hundred sixty-five".