256447652536 has 8 divisors (see below), whose sum is σ = 480839348520. Its totient is φ = 128223826264.

The previous prime is 256447652491. The next prime is 256447652557. The reversal of 256447652536 is 635256744652.

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (55) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16027978276 + ... + 16027978291.

It is an arithmetic number, because the mean of its divisors is an integer number (60104918565).

Almost surely, 2^256447652536 is an apocalyptic number.

It is an amenable number.

256447652536 is a deficient number, since it is larger than the sum of its proper divisors (224391695984).

256447652536 is a wasteful number, since it uses less digits than its factorization.

256447652536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32055956573 (or 32055956569 counting only the distinct ones).

The product of its digits is 36288000, while the sum is 55.

The spelling of 256447652536 in words is "two hundred fifty-six billion, four hundred forty-seven million, six hundred fifty-two thousand, five hundred thirty-six".