1620809841270 has 32 divisors (see below), whose sum is σ = 3889978606080. Its totient is φ = 432212070240.

The previous prime is 1620809841269. The next prime is 1620809841281. The reversal of 1620809841270 is 721489080261.

It is a happy number.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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, 5009715 + ... + 5323425.

It is an arithmetic number, because the mean of its divisors is an integer number (121561831440).

Almost surely, 2^{1620809841270} is an apocalyptic number.

1620809841270 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1620809841270 is an abundant number, since it is smaller than the sum of its proper divisors (2269168764810).

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

1620809841270 is a wasteful number, since it uses less digits than its factorization.

1620809841270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 485940.

The product of its (nonzero) digits is 387072, while the sum is 48.

The spelling of 1620809841270 in words is "one trillion, six hundred twenty billion, eight hundred nine million, eight hundred forty-one thousand, two hundred seventy".