257297358380 has 12 divisors (see below), whose sum is σ = 540324452640. Its totient is φ = 102918943344.

The previous prime is 257297358377. The next prime is 257297358391. The reversal of 257297358380 is 83853792752.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6432433940 + ... + 6432433979.

It is an arithmetic number, because the mean of its divisors is an integer number (45027037720).

Almost surely, 2^257297358380 is an apocalyptic number.

257297358380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

257297358380 is an abundant number, since it is smaller than the sum of its proper divisors (283027094260).

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

257297358380 is a wasteful number, since it uses less digits than its factorization.

257297358380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12864867928 (or 12864867926 counting only the distinct ones).

The product of its (nonzero) digits is 25401600, while the sum is 59.

The spelling of 257297358380 in words is "two hundred fifty-seven billion, two hundred ninety-seven million, three hundred fifty-eight thousand, three hundred eighty".