257140905543 has 24 divisors (see below), whose sum is σ = 372884569200. Its totient is φ = 170754240384.

The previous prime is 257140905491. The next prime is 257140905611. The reversal of 257140905543 is 345509041752.

257140905543 is a `hidden beast` number, since 2 + 5 + 7 + 1 + 4 + 0 + 90 + 554 + 3 = 666.

It is not a de Polignac number, because 257140905543 - 2¹² = 257140901447 is a prime.

It is a super-2 number, since 2×257140905543² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257140905943) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16811043 + ... + 16826331.

It is an arithmetic number, because the mean of its divisors is an integer number (15536857050).

Almost surely, 2^257140905543 is an apocalyptic number.

257140905543 is a deficient number, since it is larger than the sum of its proper divisors (115743663657).

257140905543 is a wasteful number, since it uses less digits than its factorization.

257140905543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22511 (or 22508 counting only the distinct ones).

The product of its (nonzero) digits is 756000, while the sum is 45.

The spelling of 257140905543 in words is "two hundred fifty-seven billion, one hundred forty million, nine hundred five thousand, five hundred forty-three".