1561760868 has 24 divisors (see below), whose sum is σ = 3688015968. Its totient is φ = 514314496.

The previous prime is 1561760843. The next prime is 1561760899. The reversal of 1561760868 is 8680671651.

It is a super-2 number, since 2×1561760868² = 4878194017632226848, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 783021 + ... + 785012.

It is an arithmetic number, because the mean of its divisors is an integer number (153667332).

Almost surely, 2^1561760868 is an apocalyptic number.

It is an amenable number.

1561760868 is an abundant number, since it is smaller than the sum of its proper divisors (2126255100).

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

1561760868 is a wasteful number, since it uses less digits than its factorization.

1561760868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1568123 (or 1568121 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 48.

The square root of 1561760868 is about 39519.1202837310. The cubic root of 1561760868 is about 1160.2142063794.

The spelling of 1561760868 in words is "one billion, five hundred sixty-one million, seven hundred sixty thousand, eight hundred sixty-eight".