538238493734840 has 32 divisors (see below), whose sum is σ = 1218466283377680. Its totient is φ = 213974566831872.

The previous prime is 538238493734803. The next prime is 538238493734857. The reversal of 538238493734840 is 48437394832835.

It is a super-2 number, since 2×538238493734840² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41275951589 + ... + 41275964628.

Almost surely, 2^{538238493734840} is an apocalyptic number.

It is an amenable number.

538238493734840 is an abundant number, since it is smaller than the sum of its proper divisors (680227789642840).

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

538238493734840 is a wasteful number, since it uses less digits than its factorization.

538238493734840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82551916391 (or 82551916387 counting only the distinct ones).

The product of its (nonzero) digits is 1672151040, while the sum is 71.

The spelling of 538238493734840 in words is "five hundred thirty-eight trillion, two hundred thirty-eight billion, four hundred ninety-three million, seven hundred thirty-four thousand, eight hundred forty".