256474041780 has 144 divisors (see below), whose sum is σ = 835779107520. Its totient is φ = 58518113280.

The previous prime is 256474041779. The next prime is 256474041799. The reversal of 256474041780 is 87140474652.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 915610 + ... + 1162449.

It is an arithmetic number, because the mean of its divisors is an integer number (5804021580).

Almost surely, 2^256474041780 is an apocalyptic number.

256474041780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

256474041780 is an abundant number, since it is smaller than the sum of its proper divisors (579305065740).

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

256474041780 is a wasteful number, since it uses less digits than its factorization.

256474041780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2078110 (or 2078097 counting only the distinct ones).

The product of its (nonzero) digits is 1505280, while the sum is 48.

The spelling of 256474041780 in words is "two hundred fifty-six billion, four hundred seventy-four million, forty-one thousand, seven hundred eighty".