1540000855540 has 48 divisors (see below), whose sum is σ = 3913413944832. Its totient is φ = 496941451776.

The previous prime is 1540000855537. The next prime is 1540000855567. The reversal of 1540000855540 is 455580000451.

It is a self number, because there is not a number n which added to its sum of digits gives 1540000855540.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 323527212 + ... + 323531971.

It is an arithmetic number, because the mean of its divisors is an integer number (81529457184).

Almost surely, 2^{1540000855540} is an apocalyptic number.

1540000855540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1540000855540 is an abundant number, since it is smaller than the sum of its proper divisors (2373413089292).

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

1540000855540 is a wasteful number, since it uses less digits than its factorization.

1540000855540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 647059216 (or 647059214 counting only the distinct ones).

The product of its (nonzero) digits is 80000, while the sum is 37.

Adding to 1540000855540 its reverse (455580000451), we get a palindrome (1995580855991).

The spelling of 1540000855540 in words is "one trillion, five hundred forty billion, eight hundred fifty-five thousand, five hundred forty".