1561417160 has 16 divisors (see below), whose sum is σ = 3513188700. Its totient is φ = 624566848.

The previous prime is 1561417133. The next prime is 1561417171. The reversal of 1561417160 is 617141651.

It can be written as a sum of positive squares in 2 ways, for example, as 1431411556 + 130005604 = 37834^2 + 11402^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19517675 + ... + 19517754.

Almost surely, 2^1561417160 is an apocalyptic number.

1561417160 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1561417160 is an abundant number, since it is smaller than the sum of its proper divisors (1951771540).

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

1561417160 is a wasteful number, since it uses less digits than its factorization.

1561417160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39035440 (or 39035436 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 32.

The square root of 1561417160 is about 39514.7714152569. The cubic root of 1561417160 is about 1160.1290878934.

The spelling of 1561417160 in words is "one billion, five hundred sixty-one million, four hundred seventeen thousand, one hundred sixty".