2491209706854 has 48 divisors (see below), whose sum is σ = 5798693308464. Its totient is φ = 710505438720.

The previous prime is 2491209706847. The next prime is 2491209706889. The reversal of 2491209706854 is 4586079021942.

It is a super-2 number, since 2×2491209706854² (a number of 26 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2491209706794 and 2491209706803.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 100911727 + ... + 100936410.

It is an arithmetic number, because the mean of its divisors is an integer number (120806110593).

Almost surely, 2^{2491209706854} is an apocalyptic number.

2491209706854 is an abundant number, since it is smaller than the sum of its proper divisors (3307483601610).

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

2491209706854 is a wasteful number, since it uses less digits than its factorization.

2491209706854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201848181 (or 201848170 counting only the distinct ones).

The product of its (nonzero) digits is 8709120, while the sum is 57.

The spelling of 2491209706854 in words is "two trillion, four hundred ninety-one billion, two hundred nine million, seven hundred six thousand, eight hundred fifty-four".