255842121400 has 24 divisors (see below), whose sum is σ = 594832932720. Its totient is φ = 102336848480.

The previous prime is 255842121349. The next prime is 255842121407. The reversal of 255842121400 is 4121248552.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255842121407) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 639605104 + ... + 639605503.

It is an arithmetic number, because the mean of its divisors is an integer number (24784705530).

Almost surely, 2^255842121400 is an apocalyptic number.

255842121400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

255842121400 is an abundant number, since it is smaller than the sum of its proper divisors (338990811320).

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

255842121400 is a wasteful number, since it uses less digits than its factorization.

255842121400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1279210623 (or 1279210614 counting only the distinct ones).

The product of its (nonzero) digits is 25600, while the sum is 34.

Adding to 255842121400 its reverse (4121248552), we get a palindrome (259963369952).

The spelling of 255842121400 in words is "two hundred fifty-five billion, eight hundred forty-two million, one hundred twenty-one thousand, four hundred".