257775081061 has 8 divisors (see below), whose sum is σ = 268093949024. Its totient is φ = 247652763120.

The previous prime is 257775081043. The next prime is 257775081097. The reversal of 257775081061 is 160180577752.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 257775081061 - 2²³ = 257766692453 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 257775080996 and 257775081014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257775081001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49134831 + ... + 49140076.

It is an arithmetic number, because the mean of its divisors is an integer number (33511743628).

Almost surely, 2^257775081061 is an apocalyptic number.

It is an amenable number.

257775081061 is a deficient number, since it is larger than the sum of its proper divisors (10318867963).

257775081061 is an equidigital number, since it uses as much as digits as its factorization.

257775081061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98275011.

The product of its (nonzero) digits is 823200, while the sum is 49.

The spelling of 257775081061 in words is "two hundred fifty-seven billion, seven hundred seventy-five million, eighty-one thousand, sixty-one".