257783008403 has 2 divisors, whose sum is σ = 257783008404. Its totient is φ = 257783008402.

The previous prime is 257783008381. The next prime is 257783008411. The reversal of 257783008403 is 304800387752.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-257783008403 is a prime.

It is a super-2 number, since 2×257783008403² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (257783002403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128891504201 + 128891504202.

It is an arithmetic number, because the mean of its divisors is an integer number (128891504202).

Almost surely, 2^257783008403 is an apocalyptic number.

257783008403 is a deficient number, since it is larger than the sum of its proper divisors (1).

257783008403 is an equidigital number, since it uses as much as digits as its factorization.

257783008403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1128960, while the sum is 47.

The spelling of 257783008403 in words is "two hundred fifty-seven billion, seven hundred eighty-three million, eight thousand, four hundred three".