1621822070839 has 4 divisors (see below), whose sum is σ = 1624467784456. Its totient is φ = 1619176357224.

The previous prime is 1621822070831. The next prime is 1621822070861. The reversal of 1621822070839 is 9380702281261.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1621822070839 - 2³ = 1621822070831 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1621822070792 and 1621822070801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1621822070831) 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 3 ways as a sum of consecutive naturals, for example, 1322855889 + ... + 1322857114.

It is an arithmetic number, because the mean of its divisors is an integer number (406116946114).

Almost surely, 2^{1621822070839} is an apocalyptic number.

1621822070839 is a deficient number, since it is larger than the sum of its proper divisors (2645713617).

1621822070839 is an equidigital number, since it uses as much as digits as its factorization.

1621822070839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2645713616.

The product of its (nonzero) digits is 580608, while the sum is 49.

The spelling of 1621822070839 in words is "one trillion, six hundred twenty-one billion, eight hundred twenty-two million, seventy thousand, eight hundred thirty-nine".