257757989695 has 16 divisors (see below), whose sum is σ = 311499201888. Its totient is φ = 204748502400.

The previous prime is 257757989693. The next prime is 257757989729. The reversal of 257757989695 is 596989757752.

It is not a de Polignac number, because 257757989695 - 2¹ = 257757989693 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257757989693) 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, 1005145 + ... + 1235245.

It is an arithmetic number, because the mean of its divisors is an integer number (19468700118).

Almost surely, 2^257757989695 is an apocalyptic number.

257757989695 is a deficient number, since it is larger than the sum of its proper divisors (53741212193).

257757989695 is a wasteful number, since it uses less digits than its factorization.

257757989695 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231690.

The product of its digits is 3000564000, while the sum is 79.

The spelling of 257757989695 in words is "two hundred fifty-seven billion, seven hundred fifty-seven million, nine hundred eighty-nine thousand, six hundred ninety-five".