1561796160 has 112 divisors (see below), whose sum is σ = 5129784000. Its totient is φ = 402110464.

The previous prime is 1561796147. The next prime is 1561796177. The reversal of 1561796160 is 616971651.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 210 + ... + 55889.

Almost surely, 2^1561796160 is an apocalyptic number.

1561796160 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1561796160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2564892000).

1561796160 is an abundant number, since it is smaller than the sum of its proper divisors (3567987840).

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

1561796160 is a wasteful number, since it uses less digits than its factorization.

1561796160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56148 (or 56138 counting only the distinct ones).

The product of its (nonzero) digits is 68040, while the sum is 42.

The square root of 1561796160 is about 39519.5667992452. The cubic root of 1561796160 is about 1160.2229456541. Note that the first 3 decimals are identical.

The spelling of 1561796160 in words is "one billion, five hundred sixty-one million, seven hundred ninety-six thousand, one hundred sixty".