1605251016 has 48 divisors (see below), whose sum is σ = 4356001260. Its totient is φ = 534044160.

The previous prime is 1605251009. The next prime is 1605251023. The reversal of 1605251016 is 6101525061.

It is a happy number.

1605251016 is a `hidden beast` number, since 1 + 605 + 2 + 51 + 0 + 1 + 6 = 666.

It is an interprime number because it is at equal distance from previous prime (1605251009) and next prime (1605251023).

It can be written as a sum of positive squares in 2 ways, for example, as 1589616900 + 15634116 = 39870^2 + 3954^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16116 + ... + 58908.

Almost surely, 2^1605251016 is an apocalyptic number.

It is an amenable number.

1605251016 is an abundant number, since it is smaller than the sum of its proper divisors (2750750244).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1605251016 is a wasteful number, since it uses less digits than its factorization.

1605251016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43326 (or 43319 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 27.

The square root of 1605251016 is about 40065.5839343444. The cubic root of 1605251016 is about 1170.8852034292.

Adding to 1605251016 its reverse (6101525061), we get a palindrome (7706776077).

The spelling of 1605251016 in words is "one billion, six hundred five million, two hundred fifty-one thousand, sixteen".