257795128600 has 24 divisors (see below), whose sum is σ = 599373674460. Its totient is φ = 103118051360.

The previous prime is 257795128561. The next prime is 257795128609. The reversal of 257795128600 is 6821597752.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257795128609) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 644487622 + ... + 644488021.

Almost surely, 2^257795128600 is an apocalyptic number.

257795128600 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

257795128600 is an abundant number, since it is smaller than the sum of its proper divisors (341578545860).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

257795128600 is a wasteful number, since it uses less digits than its factorization.

257795128600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1288975659 (or 1288975650 counting only the distinct ones).

The product of its (nonzero) digits is 2116800, while the sum is 52.

The spelling of 257795128600 in words is "two hundred fifty-seven billion, seven hundred ninety-five million, one hundred twenty-eight thousand, six hundred".