2491121125056 has 112 divisors (see below), whose sum is σ = 6979307815296. Its totient is φ = 781471617024.

The previous prime is 2491121125019. The next prime is 2491121125069. The reversal of 2491121125056 is 6505211211942.

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, 89507815 + ... + 89535641.

Almost surely, 2^{2491121125056} is an apocalyptic number.

It is an amenable number.

2491121125056 is an abundant number, since it is smaller than the sum of its proper divisors (4488186690240).

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

2491121125056 is a wasteful number, since it uses less digits than its factorization.

2491121125056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55286 (or 55276 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 39.

Adding to 2491121125056 its reverse (6505211211942), we get a palindrome (8996332336998).

The spelling of 2491121125056 in words is "two trillion, four hundred ninety-one billion, one hundred twenty-one million, one hundred twenty-five thousand, fifty-six".