257121091429376 has 44 divisors (see below), whose sum is σ = 514006706216892. Its totient is φ = 128556639264768.

The previous prime is 257121091429373. The next prime is 257121091429387. The reversal of 257121091429376 is 673924190121752.

It can be written as a sum of positive squares in 2 ways, for example, as 140579912089600 + 116541179339776 = 11856640^2 + 10795424^2 .

It is a super-2 number, since 2×257121091429376² (a number of 30 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (257121091429373) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30047906 + ... + 37644638.

Almost surely, 2^{257121091429376} is an apocalyptic number.

It is an amenable number.

257121091429376 is a deficient number, since it is larger than the sum of its proper divisors (256885614787516).

257121091429376 is an equidigital number, since it uses as much as digits as its factorization.

257121091429376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7629806 (or 7629788 counting only the distinct ones).

The product of its (nonzero) digits is 11430720, while the sum is 59.

The spelling of 257121091429376 in words is "two hundred fifty-seven trillion, one hundred twenty-one billion, ninety-one million, four hundred twenty-nine thousand, three hundred seventy-six".