1081603638940 has 48 divisors (see below), whose sum is σ = 2478780501120. Its totient is φ = 393163606080.

The previous prime is 1081603638911. The next prime is 1081603638949. The reversal of 1081603638940 is 498363061801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1081603638949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 325950 + ... + 1506469.

It is an arithmetic number, because the mean of its divisors is an integer number (51641260440).

Almost surely, 2^{1081603638940} is an apocalyptic number.

1081603638940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1081603638940 is an abundant number, since it is smaller than the sum of its proper divisors (1397176862180).

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

1081603638940 is a wasteful number, since it uses less digits than its factorization.

1081603638940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1835122 (or 1835120 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 49.

The spelling of 1081603638940 in words is "one trillion, eighty-one billion, six hundred three million, six hundred thirty-eight thousand, nine hundred forty".