1621377142423 has 8 divisors (see below), whose sum is σ = 1660386465792. Its totient is φ = 1582555816536.

The previous prime is 1621377142421. The next prime is 1621377142447. The reversal of 1621377142423 is 3242417731261.

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 1621377142423 - 2¹ = 1621377142421 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1621377142423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1621377142421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46981915 + ... + 47016412.

It is an arithmetic number, because the mean of its divisors is an integer number (207548308224).

Almost surely, 2^{1621377142423} is an apocalyptic number.

1621377142423 is a deficient number, since it is larger than the sum of its proper divisors (39009323369).

1621377142423 is an equidigital number, since it uses as much as digits as its factorization.

1621377142423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93998741.

The product of its digits is 338688, while the sum is 43.

The spelling of 1621377142423 in words is "one trillion, six hundred twenty-one billion, three hundred seventy-seven million, one hundred forty-two thousand, four hundred twenty-three".