257245281996 has 12 divisors (see below), whose sum is σ = 600238991352. Its totient is φ = 85748427328.

The previous prime is 257245281959. The next prime is 257245282027. The reversal of 257245281996 is 699182542752.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10718553405 + ... + 10718553428.

It is an arithmetic number, because the mean of its divisors is an integer number (50019915946).

Almost surely, 2^257245281996 is an apocalyptic number.

It is an amenable number.

257245281996 is an abundant number, since it is smaller than the sum of its proper divisors (342993709356).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

257245281996 is a wasteful number, since it uses less digits than its factorization.

257245281996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21437106840 (or 21437106838 counting only the distinct ones).

The product of its digits is 21772800, while the sum is 60.

It can be divided in two parts, 257245 and 281996, that added together give a triangular number (539241 = T₁₀₃₈).

The spelling of 257245281996 in words is "two hundred fifty-seven billion, two hundred forty-five million, two hundred eighty-one thousand, nine hundred ninety-six".