257132240177 has 4 divisors (see below), whose sum is σ = 263112059760. Its totient is φ = 251152420596.

The previous prime is 257132240129. The next prime is 257132240203. The reversal of 257132240177 is 771042231752.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-257132240177 is a prime.

It is a super-2 number, since 2×257132240177² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (257132240117) 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, 2989909727 + ... + 2989909812.

It is an arithmetic number, because the mean of its divisors is an integer number (65778014940).

Almost surely, 2^257132240177 is an apocalyptic number.

It is an amenable number.

257132240177 is a deficient number, since it is larger than the sum of its proper divisors (5979819583).

257132240177 is an equidigital number, since it uses as much as digits as its factorization.

257132240177 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5979819582.

The product of its (nonzero) digits is 164640, while the sum is 41.

The spelling of 257132240177 in words is "two hundred fifty-seven billion, one hundred thirty-two million, two hundred forty thousand, one hundred seventy-seven".