1605676481 has 8 divisors (see below), whose sum is σ = 1647531144. Its totient is φ = 1563950080.

The previous prime is 1605676447. The next prime is 1605676511. The reversal of 1605676481 is 1846765061.

It can be written as a sum of positive squares in 4 ways, for example, as 175324081 + 1430352400 = 13241^2 + 37820^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1605676481 is a prime.

It is a super-2 number, since 2×1605676481² = 5156393923273086722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1605676441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6440 + ... + 57033.

It is an arithmetic number, because the mean of its divisors is an integer number (205941393).

Almost surely, 2^1605676481 is an apocalyptic number.

It is an amenable number.

1605676481 is a deficient number, since it is larger than the sum of its proper divisors (41854663).

1605676481 is an equidigital number, since it uses as much as digits as its factorization.

1605676481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64131.

The product of its (nonzero) digits is 241920, while the sum is 44.

The square root of 1605676481 is about 40070.8931894461. The cubic root of 1605676481 is about 1170.9886403500.

The spelling of 1605676481 in words is "one billion, six hundred five million, six hundred seventy-six thousand, four hundred eighty-one".