2491755216 has 20 divisors (see below), whose sum is σ = 6437034432. Its totient is φ = 830585056.

The previous prime is 2491755193. The next prime is 2491755221. The reversal of 2491755216 is 6125571942.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25955736 + ... + 25955831.

Almost surely, 2^2491755216 is an apocalyptic number.

It is an amenable number.

2491755216 is an abundant number, since it is smaller than the sum of its proper divisors (3945279216).

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

2491755216 is a wasteful number, since it uses less digits than its factorization.

2491755216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51911578 (or 51911572 counting only the distinct ones).

The product of its digits is 151200, while the sum is 42.

The square root of 2491755216 is about 49917.4840712150. The cubic root of 2491755216 is about 1355.7151793434.

The spelling of 2491755216 in words is "two billion, four hundred ninety-one million, seven hundred fifty-five thousand, two hundred sixteen".