1605644495 has 96 divisors (see below), whose sum is σ = 2572113600. Its totient is φ = 956696832.

The previous prime is 1605644477. The next prime is 1605644497. The reversal of 1605644495 is 5944465061.

It is not a de Polignac number, because 1605644495 - 2⁶ = 1605644431 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1605644497) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 10226957 + ... + 10227113.

It is an arithmetic number, because the mean of its divisors is an integer number (26792850).

Almost surely, 2^1605644495 is an apocalyptic number.

1605644495 is a deficient number, since it is larger than the sum of its proper divisors (966469105).

1605644495 is a wasteful number, since it uses less digits than its factorization.

1605644495 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234 (or 201 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 44.

The square root of 1605644495 is about 40070.4940698265. The cubic root of 1605644495 is about 1170.9808647091.

The spelling of 1605644495 in words is "one billion, six hundred five million, six hundred forty-four thousand, four hundred ninety-five".