253537897743 has 30 divisors (see below), whose sum is σ = 410116880184. Its totient is φ = 156023313264.

The previous prime is 253537897727. The next prime is 253537897747. The reversal of 253537897743 is 347798735352.

253537897743 is a `hidden beast` number, since 2 + 5 + 3 + 537 + 8 + 97 + 7 + 4 + 3 = 666.

It is not a de Polignac number, because 253537897743 - 2⁴ = 253537897727 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253537897747) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 9246955 + ... + 9274332.

Almost surely, 2^253537897743 is an apocalyptic number.

253537897743 is a deficient number, since it is larger than the sum of its proper divisors (156578982441).

253537897743 is a wasteful number, since it uses less digits than its factorization.

253537897743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18521325 (or 18521303 counting only the distinct ones).

The product of its digits is 133358400, while the sum is 63.

The spelling of 253537897743 in words is "two hundred fifty-three billion, five hundred thirty-seven million, eight hundred ninety-seven thousand, seven hundred forty-three".