3256435236021 has 16 divisors (see below), whose sum is σ = 4775778804288. Its totient is φ = 1973597110320.

The previous prime is 3256435236013. The next prime is 3256435236029. The reversal of 3256435236021 is 1206325346523.

It is an interprime number because it is at equal distance from previous prime (3256435236013) and next prime (3256435236029).

It is not a de Polignac number, because 3256435236021 - 2³ = 3256435236013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3256435236029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 407764006 + ... + 407771991.

It is an arithmetic number, because the mean of its divisors is an integer number (298486175268).

Almost surely, 2^{3256435236021} is an apocalyptic number.

It is an amenable number.

3256435236021 is a deficient number, since it is larger than the sum of its proper divisors (1519343568267).

3256435236021 is an equidigital number, since it uses as much as digits as its factorization.

3256435236021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 815536033 (or 815536011 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 42.

The spelling of 3256435236021 in words is "three trillion, two hundred fifty-six billion, four hundred thirty-five million, two hundred thirty-six thousand, twenty-one".