257800253563 has 8 divisors (see below), whose sum is σ = 258814565856. Its totient is φ = 256786200000.

The previous prime is 257800253561. The next prime is 257800253621. The reversal of 257800253563 is 365352008752.

257800253563 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 257800253563 - 2¹ = 257800253561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (257800253561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2070063 + ... + 2191063.

It is an arithmetic number, because the mean of its divisors is an integer number (32351820732).

Almost surely, 2^257800253563 is an apocalyptic number.

257800253563 is a deficient number, since it is larger than the sum of its proper divisors (1014312293).

257800253563 is a wasteful number, since it uses less digits than its factorization.

257800253563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129365.

The product of its (nonzero) digits is 1512000, while the sum is 46.

The spelling of 257800253563 in words is "two hundred fifty-seven billion, eight hundred million, two hundred fifty-three thousand, five hundred sixty-three".