256503305652 has 48 divisors (see below), whose sum is σ = 653160860352. Its totient is φ = 77699303680.

The previous prime is 256503305633. The next prime is 256503305657.

256503305652 is nontrivially palindromic in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256503305657) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5313 + ... + 716264.

It is an arithmetic number, because the mean of its divisors is an integer number (13607517924).

Almost surely, 2^256503305652 is an apocalyptic number.

256503305652 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

256503305652 is an abundant number, since it is smaller than the sum of its proper divisors (396657554700).

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

256503305652 is a wasteful number, since it uses less digits than its factorization.

256503305652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 724288 (or 724286 counting only the distinct ones).

The product of its (nonzero) digits is 810000, while the sum is 42.

The spelling of 256503305652 in words is "two hundred fifty-six billion, five hundred three million, three hundred five thousand, six hundred fifty-two".