1540340143440 has 240 divisors, whose sum is σ = 5651878697088. Its totient is φ = 339936823296.

The previous prime is 1540340143417. The next prime is 1540340143487. The reversal of 1540340143440 is 443410430451.

It is a tau number, because it is divible by the number of its divisors (240).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 867774 + ... + 1957986.

Almost surely, 2^{1540340143440} is an apocalyptic number.

1540340143440 is a gapful number since it is divisible by the number (10) 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 1540340143440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2825939348544).

1540340143440 is an abundant number, since it is smaller than the sum of its proper divisors (4111538553648).

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

1540340143440 is a wasteful number, since it uses less digits than its factorization.

1540340143440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1090294 (or 1090259 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 33.

Adding to 1540340143440 its reverse (443410430451), we get a palindrome (1983750573891).

The spelling of 1540340143440 in words is "one trillion, five hundred forty billion, three hundred forty million, one hundred forty-three thousand, four hundred forty".