1545542105440 has 96 divisors (see below), whose sum is σ = 3778138728000. Its totient is φ = 596758837248.

The previous prime is 1545542105431. The next prime is 1545542105461. The reversal of 1545542105440 is 445012455451.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 1545542105393 and 1545542105402.

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, 20931306 + ... + 21005014.

It is an arithmetic number, because the mean of its divisors is an integer number (39355611750).

Almost surely, 2^{1545542105440} is an apocalyptic number.

1545542105440 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 1545542105440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1889069364000).

1545542105440 is an abundant number, since it is smaller than the sum of its proper divisors (2232596622560).

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

1545542105440 is a wasteful number, since it uses less digits than its factorization.

1545542105440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78272 (or 78264 counting only the distinct ones).

The product of its (nonzero) digits is 320000, while the sum is 40.

The spelling of 1545542105440 in words is "one trillion, five hundred forty-five billion, five hundred forty-two million, one hundred five thousand, four hundred forty".