256730152445 has 8 divisors (see below), whose sum is σ = 331774350936. Its totient is φ = 189585343296.

The previous prime is 256730152439. The next prime is 256730152463. The reversal of 256730152445 is 544251037652.

It can be written as a sum of positive squares in 4 ways, for example, as 46267579801 + 210462572644 = 215099^2 + 458762^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 256730152445 - 2⁶ = 256730152381 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 256730152396 and 256730152405.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1974847262 + ... + 1974847391.

It is an arithmetic number, because the mean of its divisors is an integer number (41471793867).

Almost surely, 2^256730152445 is an apocalyptic number.

It is an amenable number.

256730152445 is a deficient number, since it is larger than the sum of its proper divisors (75044198491).

256730152445 is a wasteful number, since it uses less digits than its factorization.

256730152445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3949694671.

The product of its (nonzero) digits is 1008000, while the sum is 44.

The spelling of 256730152445 in words is "two hundred fifty-six billion, seven hundred thirty million, one hundred fifty-two thousand, four hundred forty-five".