257329268440 has 32 divisors (see below), whose sum is σ = 580061126160. Its totient is φ = 102741436800.

The previous prime is 257329268437. The next prime is 257329268473. The reversal of 257329268440 is 44862923752.

It is a Smith number, since the sum of its digits (52) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5924046 + ... + 5967325.

Almost surely, 2^257329268440 is an apocalyptic number.

257329268440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

257329268440 is an abundant number, since it is smaller than the sum of its proper divisors (322731857720).

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

257329268440 is a wasteful number, since it uses less digits than its factorization.

257329268440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11891923 (or 11891919 counting only the distinct ones).

The product of its (nonzero) digits is 5806080, while the sum is 52.

The spelling of 257329268440 in words is "two hundred fifty-seven billion, three hundred twenty-nine million, two hundred sixty-eight thousand, four hundred forty".