1621432152323 has 8 divisors (see below), whose sum is σ = 1691941954848. Its totient is φ = 1550923412544.

The previous prime is 1621432152313. The next prime is 1621432152367. The reversal of 1621432152323 is 3232512341261.

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

It is a cyclic number.

It is not a de Polignac number, because 1621432152323 - 2¹⁶ = 1621432086787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1621432152313) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5759561 + ... + 6034517.

It is an arithmetic number, because the mean of its divisors is an integer number (211492744356).

Almost surely, 2^{1621432152323} is an apocalyptic number.

1621432152323 is a deficient number, since it is larger than the sum of its proper divisors (70509802525).

1621432152323 is a wasteful number, since it uses less digits than its factorization.

1621432152323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 531373.

The product of its digits is 51840, while the sum is 35.

Adding to 1621432152323 its reverse (3232512341261), we get a palindrome (4853944493584).

The spelling of 1621432152323 in words is "one trillion, six hundred twenty-one billion, four hundred thirty-two million, one hundred fifty-two thousand, three hundred twenty-three".