257887397052 has 96 divisors (see below), whose sum is σ = 720171970560. Its totient is φ = 79572525120.

The previous prime is 257887397051. The next prime is 257887397071. The reversal of 257887397052 is 250793788752.

257887397052 is a `hidden beast` number, since 2 + 578 + 8 + 7 + 3 + 9 + 7 + 0 + 52 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257887397051) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1597503 + ... + 1751510.

It is an arithmetic number, because the mean of its divisors is an integer number (7501791360).

Almost surely, 2^257887397052 is an apocalyptic number.

It is an amenable number.

257887397052 is an abundant number, since it is smaller than the sum of its proper divisors (462284573508).

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

257887397052 is a wasteful number, since it uses less digits than its factorization.

257887397052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3349080 (or 3349072 counting only the distinct ones).

The product of its (nonzero) digits is 59270400, while the sum is 63.

The spelling of 257887397052 in words is "two hundred fifty-seven billion, eight hundred eighty-seven million, three hundred ninety-seven thousand, fifty-two".