257254420147 has 8 divisors (see below), whose sum is σ = 274150872576. Its totient is φ = 240833924232.

The previous prime is 257254420139. The next prime is 257254420151. The reversal of 257254420147 is 741024452752.

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

It is not a de Polignac number, because 257254420147 - 2³ = 257254420139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (257254420177) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 118988013 + ... + 118990174.

It is an arithmetic number, because the mean of its divisors is an integer number (34268859072).

Almost surely, 2^257254420147 is an apocalyptic number.

257254420147 is a deficient number, since it is larger than the sum of its proper divisors (16896452429).

257254420147 is a wasteful number, since it uses less digits than its factorization.

257254420147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237978257.

The product of its (nonzero) digits is 627200, while the sum is 43.

Adding to 257254420147 its reverse (741024452752), we get a palindrome (998278872899).

The spelling of 257254420147 in words is "two hundred fifty-seven billion, two hundred fifty-four million, four hundred twenty thousand, one hundred forty-seven".