42049193481 has 27 divisors (see below), whose sum is σ = 62931048661. Its totient is φ = 27054664224.

The previous prime is 42049193467. The next prime is 42049193513. The reversal of 42049193481 is 18439194024.

The square root of 42049193481 is 205059.

It is a perfect power (a square), and thus also a powerful number.

42049193481 is a `hidden beast` number, since 42 + 0 + 49 + 1 + 93 + 481 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 4173806025 + 37875387456 = 64605^2 + 194616^2 .

It is a de Polignac number, because none of the positive numbers 2^k-42049193481 is a prime.

It is a super-2 number, since 2×42049193481² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42049193401) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 17838955 + ... + 17841311.

Almost surely, 2^42049193481 is an apocalyptic number.

42049193481 is the 205059-th square number.

42049193481 is the 102530-th centered octagonal number.

It is an amenable number.

42049193481 is a deficient number, since it is larger than the sum of its proper divisors (20881855180).

42049193481 is an frugal number, since it uses more digits than its factorization.

42049193481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4778 (or 2389 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The spelling of 42049193481 in words is "forty-two billion, forty-nine million, one hundred ninety-three thousand, four hundred eighty-one".