256242135102 has 16 divisors (see below), whose sum is σ = 512577906192. Its totient is φ = 85398439040.

The previous prime is 256242135091. The next prime is 256242135109. The reversal of 256242135102 is 201531242652.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256242135109) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3865899 + ... + 3931622.

It is an arithmetic number, because the mean of its divisors is an integer number (32036119137).

Almost surely, 2^256242135102 is an apocalyptic number.

256242135102 is an abundant number, since it is smaller than the sum of its proper divisors (256335771090).

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

256242135102 is a wasteful number, since it uses less digits than its factorization.

256242135102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7803003.

The product of its (nonzero) digits is 28800, while the sum is 33.

Adding to 256242135102 its reverse (201531242652), we get a palindrome (457773377754).

The spelling of 256242135102 in words is "two hundred fifty-six billion, two hundred forty-two million, one hundred thirty-five thousand, one hundred two".