256433101242 has 16 divisors (see below), whose sum is σ = 524793324000. Its totient is φ = 83489846832.

The previous prime is 256433101219. The next prime is 256433101259. The reversal of 256433101242 is 242101334652.

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, 496963117 + ... + 496963632.

It is an arithmetic number, because the mean of its divisors is an integer number (32799582750).

Almost surely, 2^256433101242 is an apocalyptic number.

256433101242 is an abundant number, since it is smaller than the sum of its proper divisors (268360222758).

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

256433101242 is a wasteful number, since it uses less digits than its factorization.

256433101242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 993926797.

The product of its (nonzero) digits is 34560, while the sum is 33.

Adding to 256433101242 its reverse (242101334652), we get a palindrome (498534435894).

The spelling of 256433101242 in words is "two hundred fifty-six billion, four hundred thirty-three million, one hundred one thousand, two hundred forty-two".