1621425083220 has 60 divisors (see below), whose sum is σ = 5086470543924. Its totient is φ = 432380021760.

The previous prime is 1621425083219. The next prime is 1621425083237. The reversal of 1621425083220 is 223805241261.

1621425083220 is a `hidden beast` number, since 1 + 6 + 2 + 1 + 425 + 0 + 8 + 3 + 220 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1219200222276 + 402224860944 = 1104174^2 + 634212^2 .

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 500438221 + ... + 500441460.

Almost surely, 2^{1621425083220} is an apocalyptic number.

1621425083220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1621425083220 is an abundant number, since it is smaller than the sum of its proper divisors (3465045460704).

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

1621425083220 is a wasteful number, since it uses less digits than its factorization.

1621425083220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1000879702 (or 1000879691 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The spelling of 1621425083220 in words is "one trillion, six hundred twenty-one billion, four hundred twenty-five million, eighty-three thousand, two hundred twenty".