257510253061 has 4 divisors (see below), whose sum is σ = 259789104972. Its totient is φ = 255231401152.

The previous prime is 257510253059. The next prime is 257510253073. The reversal of 257510253061 is 160352015752.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 78894136161 + 178616116900 = 280881^2 + 422630^2 .

It is a cyclic number.

It is not a de Polignac number, because 257510253061 - 2¹ = 257510253059 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 257510253061.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257510253041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1139425786 + ... + 1139426011.

It is an arithmetic number, because the mean of its divisors is an integer number (64947276243).

Almost surely, 2^257510253061 is an apocalyptic number.

It is an amenable number.

257510253061 is a deficient number, since it is larger than the sum of its proper divisors (2278851911).

257510253061 is a wasteful number, since it uses less digits than its factorization.

257510253061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2278851910.

The product of its (nonzero) digits is 63000, while the sum is 37.

The spelling of 257510253061 in words is "two hundred fifty-seven billion, five hundred ten million, two hundred fifty-three thousand, sixty-one".