2405165481 has 20 divisors (see below), whose sum is σ = 3594523284. Its totient is φ = 1602720000.

The previous prime is 2405165479. The next prime is 2405165509. The reversal of 2405165481 is 1845615042.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1676165481 + 729000000 = 40941^2 + 27000^2 .

It is not a de Polignac number, because 2405165481 - 2¹ = 2405165479 is a prime.

It is a super-2 number, since 2×2405165481² = 11569641981987922722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2405165681) by changing a digit.

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 19 ways as a sum of consecutive naturals, for example, 221581 + ... + 232181.

Almost surely, 2^2405165481 is an apocalyptic number.

It is an amenable number.

2405165481 is a deficient number, since it is larger than the sum of its proper divisors (1189357803).

2405165481 is a wasteful number, since it uses less digits than its factorization.

2405165481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13414 (or 13405 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 36.

The square root of 2405165481 is about 49042.4864887579. The cubic root of 2405165481 is about 1339.8257516425.

The spelling of 2405165481 in words is "two billion, four hundred five million, one hundred sixty-five thousand, four hundred eighty-one".