1561440096 has 36 divisors (see below), whose sum is σ = 4440346092. Its totient is φ = 520479936.

The previous prime is 1561440047. The next prime is 1561440107. The reversal of 1561440096 is 6900441651.

1561440096 is a `hidden beast` number, since 1 + 561 + 4 + 4 + 0 + 0 + 96 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 1561440096.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2710546 + ... + 2711121.

It is an arithmetic number, because the mean of its divisors is an integer number (123342947).

Almost surely, 2^1561440096 is an apocalyptic number.

1561440096 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1561440096 is an abundant number, since it is smaller than the sum of its proper divisors (2878905996).

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

1561440096 is a wasteful number, since it uses less digits than its factorization.

1561440096 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5421683 (or 5421672 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 1561440096 is about 39515.0616347742. The cubic root of 1561440096 is about 1160.1347683294.

The spelling of 1561440096 in words is "one billion, five hundred sixty-one million, four hundred forty thousand, ninety-six".