256415441339 has 4 divisors (see below), whose sum is σ = 256461890520. Its totient is φ = 256368992160.

The previous prime is 256415441329. The next prime is 256415441353. The reversal of 256415441339 is 933144514652.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 256415441339 - 2¹⁶ = 256415375803 is a prime.

It is a super-2 number, since 2×256415441339² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 256415441293 and 256415441302.

It is not an unprimeable number, because it can be changed into a prime (256415441329) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23216309 + ... + 23227350.

It is an arithmetic number, because the mean of its divisors is an integer number (64115472630).

Almost surely, 2^256415441339 is an apocalyptic number.

256415441339 is a deficient number, since it is larger than the sum of its proper divisors (46449181).

256415441339 is an equidigital number, since it uses as much as digits as its factorization.

256415441339 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46449180.

The product of its digits is 1555200, while the sum is 47.

The spelling of 256415441339 in words is "two hundred fifty-six billion, four hundred fifteen million, four hundred forty-one thousand, three hundred thirty-nine".