256735943900 has 54 divisors (see below), whose sum is σ = 587982288600. Its totient is φ = 97289396640.

The previous prime is 256735943887. The next prime is 256735943909. The reversal of 256735943900 is 9349537652.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256735943909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 3519800 + ... + 3591999.

It is an arithmetic number, because the mean of its divisors is an integer number (10888560900).

Almost surely, 2^256735943900 is an apocalyptic number.

256735943900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

256735943900 is an abundant number, since it is smaller than the sum of its proper divisors (331246344700).

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

256735943900 is a wasteful number, since it uses less digits than its factorization.

256735943900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7111851 (or 7111825 counting only the distinct ones).

The product of its (nonzero) digits is 6123600, while the sum is 53.

The spelling of 256735943900 in words is "two hundred fifty-six billion, seven hundred thirty-five million, nine hundred forty-three thousand, nine hundred".