257026207055 has 4 divisors (see below), whose sum is σ = 308431448472. Its totient is φ = 205620965640.

The previous prime is 257026207051. The next prime is 257026207103. The reversal of 257026207055 is 550702620752.

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

It is not a de Polignac number, because 257026207055 - 2² = 257026207051 is a prime.

It is a super-2 number, since 2×257026207055² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257026207051) 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, 25702620701 + ... + 25702620710.

It is an arithmetic number, because the mean of its divisors is an integer number (77107862118).

Almost surely, 2^257026207055 is an apocalyptic number.

257026207055 is a deficient number, since it is larger than the sum of its proper divisors (51405241417).

257026207055 is an equidigital number, since it uses as much as digits as its factorization.

257026207055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51405241416.

The product of its (nonzero) digits is 294000, while the sum is 41.

The spelling of 257026207055 in words is "two hundred fifty-seven billion, twenty-six million, two hundred seven thousand, fifty-five".