2491869952 has 144 divisors (see below), whose sum is σ = 5983262208. Its totient is φ = 1020579840.

The previous prime is 2491869943. The next prime is 2491869953. The reversal of 2491869952 is 2599681942.

It is a junction number, because it is equal to n+sod(n) for n = 2491869893 and 2491869902.

It is not an unprimeable number, because it can be changed into a prime (2491869953) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1573353 + ... + 1574935.

It is an arithmetic number, because the mean of its divisors is an integer number (41550432).

Almost surely, 2^2491869952 is an apocalyptic number.

2491869952 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2491869952, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2991631104).

2491869952 is an abundant number, since it is smaller than the sum of its proper divisors (3491392256).

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

2491869952 is a wasteful number, since it uses less digits than its factorization.

2491869952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1666 (or 1652 counting only the distinct ones).

The product of its digits is 2799360, while the sum is 55.

The square root of 2491869952 is about 49918.6333146251. The cubic root of 2491869952 is about 1355.7359875604.

The spelling of 2491869952 in words is "two billion, four hundred ninety-one million, eight hundred sixty-nine thousand, nine hundred fifty-two".