4045121021840 has 80 divisors (see below), whose sum is σ = 9645201239040. Its totient is φ = 1576995463680.

The previous prime is 4045121021813. The next prime is 4045121021857. The reversal of 4045121021840 is 481201215404.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 4045121021797 and 4045121021806.

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, 1352051 + ... + 3149330.

It is an arithmetic number, because the mean of its divisors is an integer number (120565015488).

Almost surely, 2^{4045121021840} is an apocalyptic number.

4045121021840 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4045121021840 is an abundant number, since it is smaller than the sum of its proper divisors (5600080217200).

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

4045121021840 is a wasteful number, since it uses less digits than its factorization.

4045121021840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4501680 (or 4501674 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 32.

The spelling of 4045121021840 in words is "four trillion, forty-five billion, one hundred twenty-one million, twenty-one thousand, eight hundred forty".