257194657380 has 24 divisors (see below), whose sum is σ = 720145040832. Its totient is φ = 68585241952.

The previous prime is 257194657351. The next prime is 257194657403. The reversal of 257194657380 is 83756491752.

It is a super-2 number, since 2×257194657380² (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 257194657380.

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, 2143288752 + ... + 2143288871.

It is an arithmetic number, because the mean of its divisors is an integer number (30006043368).

It is a 1-persistent number, because it is pandigital, but 2⋅257194657380 = 514389314760 is not.

Almost surely, 2^257194657380 is an apocalyptic number.

257194657380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

257194657380 is an abundant number, since it is smaller than the sum of its proper divisors (462950383452).

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

257194657380 is a wasteful number, since it uses less digits than its factorization.

257194657380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4286577635 (or 4286577633 counting only the distinct ones).

The product of its (nonzero) digits is 12700800, while the sum is 57.

The spelling of 257194657380 in words is "two hundred fifty-seven billion, one hundred ninety-four million, six hundred fifty-seven thousand, three hundred eighty".