8423547397440 has 672 divisors, whose sum is σ = 31633889796864. Its totient is φ = 1893184634880.

The previous prime is 8423547397403. The next prime is 8423547397453. The reversal of 8423547397440 is 447937453248.

It is a tau number, because it is divible by the number of its divisors (672).

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1325913304 + ... + 1325919656.

Almost surely, 2^{8423547397440} is an apocalyptic number.

8423547397440 is a gapful number since it is divisible by the number (80) 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 8423547397440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15816944898432).

8423547397440 is an abundant number, since it is smaller than the sum of its proper divisors (23210342399424).

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

8423547397440 is a wasteful number, since it uses less digits than its factorization.

8423547397440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6855 (or 6838 counting only the distinct ones).

The product of its (nonzero) digits is 81285120, while the sum is 60.

The spelling of 8423547397440 in words is "eight trillion, four hundred twenty-three billion, five hundred forty-seven million, three hundred ninety-seven thousand, four hundred forty".