257828789669 has 8 divisors (see below), whose sum is σ = 281303383680. Its totient is φ = 234360131200.

The previous prime is 257828789639. The next prime is 257828789711. The reversal of 257828789669 is 966987828752.

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 257828789669 - 2¹⁶ = 257828724133 is a prime.

It is a super-2 number, since 2×257828789669² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 257828789669.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257828789629) 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, 1392812 + ... + 1567029.

It is an arithmetic number, because the mean of its divisors is an integer number (35162922960).

Almost surely, 2^257828789669 is an apocalyptic number.

It is an amenable number.

257828789669 is a deficient number, since it is larger than the sum of its proper divisors (23474594011).

257828789669 is a wasteful number, since it uses less digits than its factorization.

257828789669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2967771.

The product of its digits is 1463132160, while the sum is 77.

The spelling of 257828789669 in words is "two hundred fifty-seven billion, eight hundred twenty-eight million, seven hundred eighty-nine thousand, six hundred sixty-nine".