257340616242 has 32 divisors (see below), whose sum is σ = 526695048000. Its totient is φ = 83778240000.

The previous prime is 257340616229. The next prime is 257340616243. The reversal of 257340616242 is 242616043752.

It is a super-3 number, since 3×257340616242³ (a number of 35 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 257340616194 and 257340616203.

It is not an unprimeable number, because it can be changed into a prime (257340616243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3641242 + ... + 3711242.

It is an arithmetic number, because the mean of its divisors is an integer number (16459220250).

Almost surely, 2^257340616242 is an apocalyptic number.

257340616242 is an abundant number, since it is smaller than the sum of its proper divisors (269354431758).

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

257340616242 is a wasteful number, since it uses less digits than its factorization.

257340616242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84298.

The product of its (nonzero) digits is 483840, while the sum is 42.

Adding to 257340616242 its reverse (242616043752), we get a palindrome (499956659994).

The spelling of 257340616242 in words is "two hundred fifty-seven billion, three hundred forty million, six hundred sixteen thousand, two hundred forty-two".