1554043540240 has 40 divisors (see below), whose sum is σ = 3619569011328. Its totient is φ = 620513281920.

The previous prime is 1554043540171. The next prime is 1554043540289. The reversal of 1554043540240 is 420453404551.

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 1554043540240.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17206776 + ... + 17296855.

Almost surely, 2^{1554043540240} is an apocalyptic number.

1554043540240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1554043540240 is an abundant number, since it is smaller than the sum of its proper divisors (2065525471088).

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

1554043540240 is a wasteful number, since it uses less digits than its factorization.

1554043540240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34504207 (or 34504201 counting only the distinct ones).

The product of its (nonzero) digits is 192000, while the sum is 37.

Adding to 1554043540240 its reverse (420453404551), we get a palindrome (1974496944791).

The spelling of 1554043540240 in words is "one trillion, five hundred fifty-four billion, forty-three million, five hundred forty thousand, two hundred forty".