423656577378 has 24 divisors (see below), whose sum is σ = 927010930716. Its totient is φ = 139820652000.

The previous prime is 423656577371. The next prime is 423656577389. The reversal of 423656577378 is 873775656324.

423656577378 is a `hidden beast` number, since 4 + 2 + 3 + 6 + 56 + 577 + 3 + 7 + 8 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 304111440369 + 119545137009 = 551463^2 + 345753^2 .

It is not an unprimeable number, because it can be changed into a prime (423656577371) 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 11 ways as a sum of consecutive naturals, for example, 116515393 + ... + 116519028.

Almost surely, 2^423656577378 is an apocalyptic number.

423656577378 is an abundant number, since it is smaller than the sum of its proper divisors (503354353338).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

423656577378 is a wasteful number, since it uses less digits than its factorization.

423656577378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233034530 (or 233034527 counting only the distinct ones).

The product of its digits is 177811200, while the sum is 63.

The spelling of 423656577378 in words is "four hundred twenty-three billion, six hundred fifty-six million, five hundred seventy-seven thousand, three hundred seventy-eight".