2540886453540 has 72 divisors (see below), whose sum is σ = 7973126474040. Its totient is φ = 654205246464.

The previous prime is 2540886453533. The next prime is 2540886453559. The reversal of 2540886453540 is 453546880452.

2540886453540 is a `hidden beast` number, since 2 + 5 + 4 + 0 + 8 + 8 + 64 + 535 + 40 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 19517207616 + 2521369245924 = 139704^2 + 1587882^2 .

It is a super-2 number, since 2×2540886453540² (a number of 26 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 243374709 + ... + 243385148.

It is an arithmetic number, because the mean of its divisors is an integer number (110737867695).

Almost surely, 2^{2540886453540} is an apocalyptic number.

2540886453540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2540886453540 is an abundant number, since it is smaller than the sum of its proper divisors (5432240020500).

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

2540886453540 is a wasteful number, since it uses less digits than its factorization.

2540886453540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 486759901 (or 486759896 counting only the distinct ones).

The product of its (nonzero) digits is 18432000, while the sum is 54.

The spelling of 2540886453540 in words is "two trillion, five hundred forty billion, eight hundred eighty-six million, four hundred fifty-three thousand, five hundred forty".