1542840639680 has 112 divisors (see below), whose sum is σ = 3703117978560. Its totient is φ = 612237312000.

The previous prime is 1542840639661. The next prime is 1542840639713. The reversal of 1542840639680 is 869360482451.

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, 37137320 + ... + 37178840.

It is an arithmetic number, because the mean of its divisors is an integer number (33063553380).

Almost surely, 2^{1542840639680} is an apocalyptic number.

1542840639680 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 1542840639680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1851558989280).

1542840639680 is an abundant number, since it is smaller than the sum of its proper divisors (2160277338880).

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

1542840639680 is a wasteful number, since it uses less digits than its factorization.

1542840639680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42458 (or 42448 counting only the distinct ones).

The product of its (nonzero) digits is 9953280, while the sum is 56.

The spelling of 1542840639680 in words is "one trillion, five hundred forty-two billion, eight hundred forty million, six hundred thirty-nine thousand, six hundred eighty".