1423821697600 has 189 divisors, whose sum is σ = 3665265783627. Its totient is φ = 544346542080.

The previous prime is 1423821697589. The next prime is 1423821697607. The reversal of 1423821697600 is 67961283241.

It is a happy number.

The square root of 1423821697600 is 1193240.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 438042775104 + 985778922496 = 661848^2 + 992864^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1423821697607) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 1097780152 + ... + 1097781448.

Almost surely, 2^{1423821697600} is an apocalyptic number.

1423821697600 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1423821697600 is the 1193240-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1423821697600

1423821697600 is an abundant number, since it is smaller than the sum of its proper divisors (2241444086027).

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

1423821697600 is an frugal number, since it uses more digits than its factorization.

1423821697600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2662 (or 1327 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 49.

Multiplying 1423821697600 by its sum of digits (49), we get a square (69767263182400 = 8352680²).

The spelling of 1423821697600 in words is "one trillion, four hundred twenty-three billion, eight hundred twenty-one million, six hundred ninety-seven thousand, six hundred".