423178332640 has 96 divisors (see below), whose sum is σ = 1143908075520. Its totient is φ = 144921260544.

The previous prime is 423178332611. The next prime is 423178332659. The reversal of 423178332640 is 46233871324.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 747651 + ... + 1185469.

It is an arithmetic number, because the mean of its divisors is an integer number (11915709120).

Almost surely, 2^423178332640 is an apocalyptic number.

423178332640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 423178332640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (571954037760).

423178332640 is an abundant number, since it is smaller than the sum of its proper divisors (720729742880).

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

423178332640 is a wasteful number, since it uses less digits than its factorization.

423178332640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 438704 (or 438696 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 43.

The spelling of 423178332640 in words is "four hundred twenty-three billion, one hundred seventy-eight million, three hundred thirty-two thousand, six hundred forty".