257305306067542 has 8 divisors (see below), whose sum is σ = 393240184744896. Its totient is φ = 126225244485912.

The previous prime is 257305306067503. The next prime is 257305306067543. The reversal of 257305306067542 is 245760603503752.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×257305306067542² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257305306067543) 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, 1213704273798 + ... + 1213704274009.

It is an arithmetic number, because the mean of its divisors is an integer number (49155023093112).

Almost surely, 2^{257305306067542} is an apocalyptic number.

257305306067542 is a deficient number, since it is larger than the sum of its proper divisors (135934878677354).

257305306067542 is a wasteful number, since it uses less digits than its factorization.

257305306067542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2427408547862.

The product of its (nonzero) digits is 31752000, while the sum is 55.

The spelling of 257305306067542 in words is "two hundred fifty-seven trillion, three hundred five billion, three hundred six million, sixty-seven thousand, five hundred forty-two".