1605606464 has 56 divisors (see below), whose sum is σ = 3972324288. Its totient is φ = 625559040.

The previous prime is 1605606461. The next prime is 1605606473. The reversal of 1605606464 is 4646065061.

It is a tau number, because it is divible by the number of its divisors (56).

It is not an unprimeable number, because it can be changed into a prime (1605606461) 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, 157979 + ... + 167834.

Almost surely, 2^1605606464 is an apocalyptic number.

1605606464 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1605606464 is an abundant number, since it is smaller than the sum of its proper divisors (2366717824).

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

1605606464 is a wasteful number, since it uses less digits than its factorization.

1605606464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325843 (or 325833 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 38.

The square root of 1605606464 is about 40070.0195158425. The cubic root of 1605606464 is about 1170.9716194237.

The spelling of 1605606464 in words is "one billion, six hundred five million, six hundred six thousand, four hundred sixty-four".