1565442604 has 48 divisors (see below), whose sum is σ = 3166168320. Its totient is φ = 669764160.

The previous prime is 1565442601. The next prime is 1565442617. The reversal of 1565442604 is 4062445651.

It is a super-2 number, since 2×1565442604² = 4901221092836601632, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1565442601) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 125289 + ... + 137215.

It is an arithmetic number, because the mean of its divisors is an integer number (65961840).

Almost surely, 2^1565442604 is an apocalyptic number.

It is an amenable number.

1565442604 is an abundant number, since it is smaller than the sum of its proper divisors (1600725716).

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

1565442604 is a wasteful number, since it uses less digits than its factorization.

1565442604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12118 (or 12116 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 37.

The square root of 1565442604 is about 39565.6745677361. The cubic root of 1565442604 is about 1161.1251973482.

The spelling of 1565442604 in words is "one billion, five hundred sixty-five million, four hundred forty-two thousand, six hundred four".