2191456480 has 24 divisors (see below), whose sum is σ = 5177316312. Its totient is φ = 876582528.

The previous prime is 2191456469. The next prime is 2191456481. The reversal of 2191456480 is 846541912.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2191456481) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6848142 + ... + 6848461.

It is an arithmetic number, because the mean of its divisors is an integer number (215721513).

Almost surely, 2^2191456480 is an apocalyptic number.

2191456480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2191456480 is an abundant number, since it is smaller than the sum of its proper divisors (2985859832).

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

2191456480 is a wasteful number, since it uses less digits than its factorization.

2191456480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13696618 (or 13696610 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 40.

The square root of 2191456480 is about 46812.9947770915. The cubic root of 2191456480 is about 1298.9056826315.

It can be divided in two parts, 219145 and 6480, that added together give a square (225625 = 475²).

The spelling of 2191456480 in words is "two billion, one hundred ninety-one million, four hundred fifty-six thousand, four hundred eighty".