1561601304 has 48 divisors (see below), whose sum is σ = 4240454400. Its totient is φ = 519165504.

The previous prime is 1561601297. The next prime is 1561601329. The reversal of 1561601304 is 4031061651.

1561601304 is a `hidden beast` number, since 1 + 56 + 1 + 601 + 3 + 0 + 4 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 739 + ... + 55890.

It is an arithmetic number, because the mean of its divisors is an integer number (88342800).

Almost surely, 2^1561601304 is an apocalyptic number.

It is an amenable number.

1561601304 is an abundant number, since it is smaller than the sum of its proper divisors (2678853096).

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

1561601304 is a wasteful number, since it uses less digits than its factorization.

1561601304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57024 (or 57017 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 1561601304 is about 39517.1014119204. The cubic root of 1561601304 is about 1160.1746922796.

Adding to 1561601304 its reverse (4031061651), we get a palindrome (5592662955).

It can be divided in two parts, 156160 and 1304, that added together give a cube (157464 = 54³).

The spelling of 1561601304 in words is "one billion, five hundred sixty-one million, six hundred one thousand, three hundred four".