2540555355520 has 384 divisors, whose sum is σ = 7617981873600. Its totient is φ = 803050536960.

The previous prime is 2540555355487. The next prime is 2540555355539. The reversal of 2540555355520 is 255535550452.

It is a happy number.

It is a super-2 number, since 2×2540555355520² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 374654530 + ... + 374661310.

Almost surely, 2^{2540555355520} is an apocalyptic number.

2540555355520 is a gapful number since it is divisible by the number (20) 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 2540555355520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3808990936800).

2540555355520 is an abundant number, since it is smaller than the sum of its proper divisors (5077426518080).

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

2540555355520 is a wasteful number, since it uses less digits than its factorization.

2540555355520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7746 (or 7727 counting only the distinct ones).

The product of its (nonzero) digits is 3750000, while the sum is 46.

It can be divided in two parts, 254055 and 5355520, that added together give a triangular number (5609575 = T₃₃₄₉).

The spelling of 2540555355520 in words is "two trillion, five hundred forty billion, five hundred fifty-five million, three hundred fifty-five thousand, five hundred twenty".