1621622580001 has 8 divisors (see below), whose sum is σ = 1623556042304. Its totient is φ = 1619689886640.

The previous prime is 1621622579947. The next prime is 1621622580007. The reversal of 1621622580001 is 1000852261261.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1621622580001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1621622580007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4084630 + ... + 4464016.

It is an arithmetic number, because the mean of its divisors is an integer number (202944505288).

Almost surely, 2^{1621622580001} is an apocalyptic number.

It is an amenable number.

1621622580001 is a deficient number, since it is larger than the sum of its proper divisors (1933462303).

1621622580001 is a wasteful number, since it uses less digits than its factorization.

1621622580001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384471.

The product of its (nonzero) digits is 11520, while the sum is 34.

The spelling of 1621622580001 in words is "one trillion, six hundred twenty-one billion, six hundred twenty-two million, five hundred eighty thousand, one".