2491061683464 has 448 divisors, whose sum is σ = 7520221238400. Its totient is φ = 770943744000.

The previous prime is 2491061683457. The next prime is 2491061683477. The reversal of 2491061683464 is 4643861601942.

2491061683464 is a `hidden beast` number, since 2 + 4 + 9 + 10 + 6 + 168 + 3 + 464 = 666.

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

It is a self number, because there is not a number n which added to its sum of digits gives 2491061683464.

It is an unprimeable number.

It is a polite number, since it can be written in 111 ways as a sum of consecutive naturals, for example, 1152734544 + ... + 1152736704.

Almost surely, 2^{2491061683464} is an apocalyptic number.

2491061683464 is a gapful number since it is divisible by the number (24) 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 2491061683464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3760110619200).

2491061683464 is an abundant number, since it is smaller than the sum of its proper divisors (5029159554936).

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

2491061683464 is a wasteful number, since it uses less digits than its factorization.

2491061683464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2408 (or 2389 counting only the distinct ones).

The product of its (nonzero) digits is 5971968, while the sum is 54.

The spelling of 2491061683464 in words is "two trillion, four hundred ninety-one billion, sixty-one million, six hundred eighty-three thousand, four hundred sixty-four".