320123203400400 has 120 divisors (see below), whose sum is σ = 1058540726033664. Its totient is φ = 82612439577600.

The previous prime is 320123203400321. The next prime is 320123203400477. The reversal of 320123203400400 is 4004302321023.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4302694029 + ... + 4302768428.

Almost surely, 2^{320123203400400} is an apocalyptic number.

320123203400400 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

320123203400400 is an abundant number, since it is smaller than the sum of its proper divisors (738417522633264).

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

320123203400400 is a wasteful number, since it uses less digits than its factorization.

320123203400400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8605462509 (or 8605462498 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 24.

Adding to 320123203400400 its reverse (4004302321023), we get a palindrome (324127505721423).

The spelling of 320123203400400 in words is "three hundred twenty trillion, one hundred twenty-three billion, two hundred three million, four hundred thousand, four hundred".