257330733061 has 4 divisors (see below), whose sum is σ = 257459852332. Its totient is φ = 257201613792.

The previous prime is 257330733053. The next prime is 257330733083. The reversal of 257330733061 is 160337033752.

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 228130416900 + 29200316161 = 477630^2 + 170881^2 .

It is a cyclic number.

It is not a de Polignac number, because 257330733061 - 2³ = 257330733053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257330733761) 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, 64556646 + ... + 64560631.

It is an arithmetic number, because the mean of its divisors is an integer number (64364963083).

Almost surely, 2^257330733061 is an apocalyptic number.

It is an amenable number.

257330733061 is a deficient number, since it is larger than the sum of its proper divisors (129119271).

257330733061 is a wasteful number, since it uses less digits than its factorization.

257330733061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129119270.

The product of its (nonzero) digits is 238140, while the sum is 40.

The spelling of 257330733061 in words is "two hundred fifty-seven billion, three hundred thirty million, seven hundred thirty-three thousand, sixty-one".