257476221016 has 64 divisors (see below), whose sum is σ = 565061333760. Its totient is φ = 107709264000.

The previous prime is 257476220959. The next prime is 257476221053. The reversal of 257476221016 is 610122674752.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 159811 + ... + 735181.

It is an arithmetic number, because the mean of its divisors is an integer number (8829083340).

Almost surely, 2^257476221016 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 257476221016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (282530666880).

257476221016 is an abundant number, since it is smaller than the sum of its proper divisors (307585112744).

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

257476221016 is a wasteful number, since it uses less digits than its factorization.

257476221016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 575576 (or 575572 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 43.

Adding to 257476221016 its reverse (610122674752), we get a palindrome (867598895768).

The spelling of 257476221016 in words is "two hundred fifty-seven billion, four hundred seventy-six million, two hundred twenty-one thousand, sixteen".