2491380291456 has 1056 divisors, whose sum is σ = 8971204878000. Its totient is φ = 688860910080.

The previous prime is 2491380291419. The next prime is 2491380291469. The reversal of 2491380291456 is 6541920831942.

It is a happy number.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

2491380291456 is a `hidden beast` number, since 2 + 4 + 91 + 3 + 80 + 29 + 1 + 456 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 131 ways as a sum of consecutive naturals, for example, 80367106161 + ... + 80367106191.

Almost surely, 2^{2491380291456} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2491380291456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4485602439000).

2491380291456 is an abundant number, since it is smaller than the sum of its proper divisors (6479824586544).

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

2491380291456 is an frugal number, since it uses more digits than its factorization.

2491380291456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127 (or 43 counting only the distinct ones).

The product of its (nonzero) digits is 3732480, while the sum is 54.

The spelling of 2491380291456 in words is "two trillion, four hundred ninety-one billion, three hundred eighty million, two hundred ninety-one thousand, four hundred fifty-six".