4542121622440 has 128 divisors (see below), whose sum is σ = 10825883280000. Its totient is φ = 1710319961088.

The previous prime is 4542121622393. The next prime is 4542121622477. The reversal of 4542121622440 is 442261212454.

It is a self number, because there is not a number n which added to its sum of digits gives 4542121622440.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 262556911 + ... + 262574209.

It is an arithmetic number, because the mean of its divisors is an integer number (84577213125).

Almost surely, 2^{4542121622440} is an apocalyptic number.

4542121622440 is a gapful number since it is divisible by the number (40) 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 4542121622440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5412941640000).

4542121622440 is an abundant number, since it is smaller than the sum of its proper divisors (6283761657560).

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

4542121622440 is a wasteful number, since it uses less digits than its factorization.

4542121622440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19499 (or 19495 counting only the distinct ones).

The product of its (nonzero) digits is 122880, while the sum is 37.

Adding to 4542121622440 its reverse (442261212454), we get a palindrome (4984382834894).

The spelling of 4542121622440 in words is "four trillion, five hundred forty-two billion, one hundred twenty-one million, six hundred twenty-two thousand, four hundred forty".