257361551983 has 2 divisors, whose sum is σ = 257361551984. Its totient is φ = 257361551982.

The previous prime is 257361551963. The next prime is 257361552013. The reversal of 257361551983 is 389155163752.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-257361551983 is a prime.

It is a super-2 number, since 2×257361551983² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (257361551963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128680775991 + 128680775992.

It is an arithmetic number, because the mean of its divisors is an integer number (128680775992).

Almost surely, 2^257361551983 is an apocalyptic number.

257361551983 is a deficient number, since it is larger than the sum of its proper divisors (1).

257361551983 is an equidigital number, since it uses as much as digits as its factorization.

257361551983 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6804000, while the sum is 55.

The spelling of 257361551983 in words is "two hundred fifty-seven billion, three hundred sixty-one million, five hundred fifty-one thousand, nine hundred eighty-three".