423131171778 has 192 divisors, whose sum is σ = 1102712832000. Its totient is φ = 114726119040.

The previous prime is 423131171761. The next prime is 423131171779. The reversal of 423131171778 is 877171131324.

423131171778 is a `hidden beast` number, since 423 + 131 + 17 + 17 + 78 = 666.

It is not an unprimeable number, because it can be changed into a prime (423131171779) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 45972925 + ... + 45982127.

It is an arithmetic number, because the mean of its divisors is an integer number (5743296000).

Almost surely, 2^423131171778 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 423131171778, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (551356416000).

423131171778 is an abundant number, since it is smaller than the sum of its proper divisors (679581660222).

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

423131171778 is a wasteful number, since it uses less digits than its factorization.

423131171778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9477 (or 9474 counting only the distinct ones).

The product of its digits is 197568, while the sum is 45.

The spelling of 423131171778 in words is "four hundred twenty-three billion, one hundred thirty-one million, one hundred seventy-one thousand, seven hundred seventy-eight".