257147182516 has 18 divisors (see below), whose sum is σ = 523478193378. Its totient is φ = 110205935280.

The previous prime is 257147182511. The next prime is 257147182531. The reversal of 257147182516 is 615281741752.

It can be written as a sum of positive squares in only one way, i.e., 181004298916 + 76142883600 = 425446^2 + 275940^2 .

It is a super-2 number, since 2×257147182516² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a self number, because there is not a number n which added to its sum of digits gives 257147182516.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257147182511) 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, 655987515 + ... + 655987906.

Almost surely, 2^257147182516 is an apocalyptic number.

It is an amenable number.

257147182516 is an abundant number, since it is smaller than the sum of its proper divisors (266331010862).

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

257147182516 is a wasteful number, since it uses less digits than its factorization.

257147182516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1311975439 (or 1311975430 counting only the distinct ones).

The product of its digits is 940800, while the sum is 49.

The spelling of 257147182516 in words is "two hundred fifty-seven billion, one hundred forty-seven million, one hundred eighty-two thousand, five hundred sixteen".