2491466688 has 210 divisors, whose sum is σ = 7850201216. Its totient is φ = 781166592.

The previous prime is 2491466641. The next prime is 2491466701. The reversal of 2491466688 is 8866641942.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 1497345 + ... + 1499007.

Almost surely, 2^2491466688 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2491466688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3925100608).

2491466688 is an abundant number, since it is smaller than the sum of its proper divisors (5358734528).

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

2491466688 is a wasteful number, since it uses less digits than its factorization.

2491466688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1721 (or 1685 counting only the distinct ones).

The product of its digits is 3981312, while the sum is 54.

The square root of 2491466688 is about 49914.5939380458. The cubic root of 2491466688 is about 1355.6628498468.

The spelling of 2491466688 in words is "two billion, four hundred ninety-one million, four hundred sixty-six thousand, six hundred eighty-eight".