1610264665 has 4 divisors (see below), whose sum is σ = 1932317604. Its totient is φ = 1288211728.

The previous prime is 1610264563. The next prime is 1610264681. The reversal of 1610264665 is 5664620161.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 576192016 + 1034072649 = 24004^2 + 32157^2 .

It is a cyclic number.

It is not a de Polignac number, because 1610264665 - 2²³ = 1601876057 is a prime.

It is a Duffinian number.

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 3 ways as a sum of consecutive naturals, for example, 161026462 + ... + 161026471.

It is an arithmetic number, because the mean of its divisors is an integer number (483079401).

Almost surely, 2^1610264665 is an apocalyptic number.

It is an amenable number.

1610264665 is a deficient number, since it is larger than the sum of its proper divisors (322052939).

1610264665 is an equidigital number, since it uses as much as digits as its factorization.

1610264665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322052938.

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 1610264665 is about 40128.1031821839. The cubic root of 1610264665 is about 1172.1029374597.

The spelling of 1610264665 in words is "one billion, six hundred ten million, two hundred sixty-four thousand, six hundred sixty-five".