1561601024 has 44 divisors (see below), whose sum is σ = 3126800688. Its totient is φ = 779520000.

The previous prime is 1561601023. The next prime is 1561601033. The reversal of 1561601024 is 4201061651.

It is a junction number, because it is equal to n+sod(n) for n = 1561600984 and 1561601002.

It is not an unprimeable number, because it can be changed into a prime (1561601023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1075499 + ... + 1076949.

It is an arithmetic number, because the mean of its divisors is an integer number (71063652).

Almost surely, 2^1561601024 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1561601024, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1563400344).

1561601024 is an abundant number, since it is smaller than the sum of its proper divisors (1565199664).

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

1561601024 is a wasteful number, since it uses less digits than its factorization.

1561601024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2522 (or 2504 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 1561601024 is about 39517.0978691503. The cubic root of 1561601024 is about 1160.1746229386.

Adding to 1561601024 its reverse (4201061651), we get a palindrome (5762662675).

The spelling of 1561601024 in words is "one billion, five hundred sixty-one million, six hundred one thousand, twenty-four".