256273337720 has 16 divisors (see below), whose sum is σ = 576615009960. Its totient is φ = 102509335072.

The previous prime is 256273337699. The next prime is 256273337731. The reversal of 256273337720 is 27733372652.

It is a super-2 number, since 2×256273337720² (a number of 24 digits) contains 22 as substring.

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, 3203416682 + ... + 3203416761.

Almost surely, 2^256273337720 is an apocalyptic number.

256273337720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

256273337720 is an abundant number, since it is smaller than the sum of its proper divisors (320341672240).

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

256273337720 is a wasteful number, since it uses less digits than its factorization.

256273337720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6406833454 (or 6406833450 counting only the distinct ones).

The product of its (nonzero) digits is 2222640, while the sum is 47.

The spelling of 256273337720 in words is "two hundred fifty-six billion, two hundred seventy-three million, three hundred thirty-seven thousand, seven hundred twenty".