1605140564 has 24 divisors (see below), whose sum is σ = 2825433576. Its totient is φ = 797888000.

The previous prime is 1605140557. The next prime is 1605140573. The reversal of 1605140564 is 4650415061.

It can be written as a sum of positive squares in 4 ways, for example, as 111936400 + 1493204164 = 10580^2 + 38642^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1605140564.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 584234 + ... + 586974.

It is an arithmetic number, because the mean of its divisors is an integer number (117726399).

Almost surely, 2^1605140564 is an apocalyptic number.

It is an amenable number.

1605140564 is a deficient number, since it is larger than the sum of its proper divisors (1220293012).

1605140564 is a wasteful number, since it uses less digits than its factorization.

1605140564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3547 (or 3545 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 32.

The square root of 1605140564 is about 40064.2055206390. The cubic root of 1605140564 is about 1170.8583479037.

The spelling of 1605140564 in words is "one billion, six hundred five million, one hundred forty thousand, five hundred sixty-four".