2491243776 has 252 divisors, whose sum is σ = 8525295072. Its totient is φ = 711410688.

The previous prime is 2491243759. The next prime is 2491243817. The reversal of 2491243776 is 6773421942.

It is a tau number, because it is divible by the number of its divisors (252).

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 27 ways as a sum of consecutive naturals, for example, 1305415 + ... + 1307321.

It is an arithmetic number, because the mean of its divisors is an integer number (33830536).

Almost surely, 2^2491243776 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 2491243776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4262647536).

2491243776 is an abundant number, since it is smaller than the sum of its proper divisors (6034051296).

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

2491243776 is an frugal number, since it uses more digits than its factorization.

2491243776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1948 (or 1919 counting only the distinct ones).

The product of its digits is 508032, while the sum is 45.

The square root of 2491243776 is about 49912.3609539761. The cubic root of 2491243776 is about 1355.6224181697.

The spelling of 2491243776 in words is "two billion, four hundred ninety-one million, two hundred forty-three thousand, seven hundred seventy-six".