623356255404421 has 16 divisors (see below), whose sum is σ = 784434719761920. Its totient is φ = 481192594285680.

The previous prime is 623356255404391. The next prime is 623356255404511. The reversal of 623356255404421 is 124404552653326.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 623356255404421 - 2³¹ = 623354107920773 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (623356255404221) 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 15 ways as a sum of consecutive naturals, for example, 37829598231 + ... + 37829614708.

It is an arithmetic number, because the mean of its divisors is an integer number (49027169985120).

Almost surely, 2^{623356255404421} is an apocalyptic number.

It is an amenable number.

623356255404421 is a deficient number, since it is larger than the sum of its proper divisors (161078464357499).

623356255404421 is a wasteful number, since it uses less digits than its factorization.

623356255404421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75659213064.

The product of its (nonzero) digits is 20736000, while the sum is 52.

The spelling of 623356255404421 in words is "six hundred twenty-three trillion, three hundred fifty-six billion, two hundred fifty-five million, four hundred four thousand, four hundred twenty-one".