1620427488840 has 576 divisors, whose sum is σ = 5906631931200. Its totient is φ = 399037072896.

The previous prime is 1620427488793. The next prime is 1620427488847. The reversal of 1620427488840 is 488847240261.

1620427488840 is a `hidden beast` number, since 1 + 62 + 0 + 4 + 27 + 488 + 84 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (1620427488847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 149109087 + ... + 149119953.

It is an arithmetic number, because the mean of its divisors is an integer number (10254569325).

Almost surely, 2^{1620427488840} is an apocalyptic number.

1620427488840 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 1620427488840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2953315965600).

1620427488840 is an abundant number, since it is smaller than the sum of its proper divisors (4286204442360).

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

1620427488840 is a wasteful number, since it uses less digits than its factorization.

1620427488840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10968 (or 10929 counting only the distinct ones).

The product of its (nonzero) digits is 5505024, while the sum is 54.

The spelling of 1620427488840 in words is "one trillion, six hundred twenty billion, four hundred twenty-seven million, four hundred eighty-eight thousand, eight hundred forty".