2491538000 has 80 divisors (see below), whose sum is σ = 6885225984. Its totient is φ = 854236800.

The previous prime is 2491537999. The next prime is 2491538011. The reversal of 2491538000 is 8351942.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74984 + ... + 102983.

Almost surely, 2^2491538000 is an apocalyptic number.

2491538000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2491538000 is an abundant number, since it is smaller than the sum of its proper divisors (4393687984).

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

2491538000 is a wasteful number, since it uses less digits than its factorization.

2491538000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177997 (or 177981 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 2491538000 is about 49915.3082731140. The cubic root of 2491538000 is about 1355.6757838758.

Adding to 2491538000 its reverse (8351942), we get a palindrome (2499889942).

The spelling of 2491538000 in words is "two billion, four hundred ninety-one million, five hundred thirty-eight thousand".