256541153237 has 2 divisors, whose sum is σ = 256541153238. Its totient is φ = 256541153236.

The previous prime is 256541153137. The next prime is 256541153261. The reversal of 256541153237 is 732351145652.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 254186380561 + 2354772676 = 504169^2 + 48526^2 .

It is a cyclic number.

It is not a de Polignac number, because 256541153237 - 2¹⁸ = 256540891093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256541153137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128270576618 + 128270576619.

It is an arithmetic number, because the mean of its divisors is an integer number (128270576619).

Almost surely, 2^256541153237 is an apocalyptic number.

It is an amenable number.

256541153237 is a deficient number, since it is larger than the sum of its proper divisors (1).

256541153237 is an equidigital number, since it uses as much as digits as its factorization.

256541153237 is an evil number, because the sum of its binary digits is even.

The product of its digits is 756000, while the sum is 44.

Adding to 256541153237 its reverse (732351145652), we get a palindrome (988892298889).

The spelling of 256541153237 in words is "two hundred fifty-six billion, five hundred forty-one million, one hundred fifty-three thousand, two hundred thirty-seven".