401205120256 has 36 divisors (see below), whose sum is σ = 814416674400. Its totient is φ = 197202509312.

The previous prime is 401205120203. The next prime is 401205120293. The reversal of 401205120256 is 652021502104.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13266316 + ... + 13296523.

It is an arithmetic number, because the mean of its divisors is an integer number (22622685400).

Almost surely, 2^401205120256 is an apocalyptic number.

It is an amenable number.

401205120256 is an abundant number, since it is smaller than the sum of its proper divisors (413211554144).

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

401205120256 is an equidigital number, since it uses as much as digits as its factorization.

401205120256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26562914 (or 26562900 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 28.

The spelling of 401205120256 in words is "four hundred one billion, two hundred five million, one hundred twenty thousand, two hundred fifty-six".