423189716640 has 48 divisors (see below), whose sum is σ = 1333047608928. Its totient is φ = 112850590976.

The previous prime is 423189716617. The next prime is 423189716713. The reversal of 423189716640 is 46617981324.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (48).

It is a hoax number, since the sum of its digits (51) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 440822142 + ... + 440823101.

It is an arithmetic number, because the mean of its divisors is an integer number (27771825186).

Almost surely, 2^423189716640 is an apocalyptic number.

423189716640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

423189716640 is an abundant number, since it is smaller than the sum of its proper divisors (909857892288).

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

423189716640 is a wasteful number, since it uses less digits than its factorization.

423189716640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 881645261 (or 881645253 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 51.

The spelling of 423189716640 in words is "four hundred twenty-three billion, one hundred eighty-nine million, seven hundred sixteen thousand, six hundred forty".