195423459840 has 320 divisors, whose sum is σ = 793328152320. Its totient is φ = 44668108800.

The previous prime is 195423459839. The next prime is 195423459853. The reversal of 195423459840 is 48954324591.

It is a happy number.

195423459840 is a `hidden beast` number, since 1 + 9 + 5 + 4 + 2 + 3 + 4 + 598 + 40 = 666.

It is a tau number, because it is divible by the number of its divisors (320).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 281890 + ... + 685790.

It is an arithmetic number, because the mean of its divisors is an integer number (2479150476).

Almost surely, 2^195423459840 is an apocalyptic number.

195423459840 is a gapful number since it is divisible by the number (10) 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 195423459840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (396664076160).

195423459840 is an abundant number, since it is smaller than the sum of its proper divisors (597904692480).

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

195423459840 is an equidigital number, since it uses as much as digits as its factorization.

195423459840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403940 (or 403918 counting only the distinct ones).

The product of its (nonzero) digits is 6220800, while the sum is 54.

The spelling of 195423459840 in words is "one hundred ninety-five billion, four hundred twenty-three million, four hundred fifty-nine thousand, eight hundred forty".