1561425800 has 48 divisors (see below), whose sum is σ = 3960349200. Its totient is φ = 567790400.

The previous prime is 1561425799. The next prime is 1561425829. The reversal of 1561425800 is 85241651.

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, 352670 + ... + 357069.

It is an arithmetic number, because the mean of its divisors is an integer number (82507275).

Almost surely, 2^1561425800 is an apocalyptic number.

1561425800 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1561425800 is an abundant number, since it is smaller than the sum of its proper divisors (2398923400).

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

1561425800 is a wasteful number, since it uses less digits than its factorization.

1561425800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 709766 (or 709757 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 32.

The square root of 1561425800 is about 39514.8807413106. The cubic root of 1561425800 is about 1160.1312277224.

It can be divided in two parts, 15614 and 25800, that added together give a palindrome (41414).

The spelling of 1561425800 in words is "one billion, five hundred sixty-one million, four hundred twenty-five thousand, eight hundred".