2199781560 has 64 divisors (see below), whose sum is σ = 6609566880. Its totient is φ = 585699840.

The previous prime is 2199781553. The next prime is 2199781603. The reversal of 2199781560 is 651879912.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65454 + ... + 93186.

Almost surely, 2^2199781560 is an apocalyptic number.

2199781560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2199781560 is an abundant number, since it is smaller than the sum of its proper divisors (4409785320).

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

2199781560 is a wasteful number, since it uses less digits than its factorization.

2199781560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28408 (or 28404 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 48.

The square root of 2199781560 is about 46901.8289622057. The cubic root of 2199781560 is about 1300.5483997909.

It can be divided in two parts, 21997815 and 60, that multiplied together give a square (1319868900 = 36330²).

The spelling of 2199781560 in words is "two billion, one hundred ninety-nine million, seven hundred eighty-one thousand, five hundred sixty".