1491483948138 has 12 divisors (see below), whose sum is σ = 3231548554338. Its totient is φ = 497161316040.

The previous prime is 1491483948137. The next prime is 1491483948151. The reversal of 1491483948138 is 8318493841941.

1491483948138 is a `hidden beast` number, since 1 + 4 + 9 + 148 + 3 + 9 + 481 + 3 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1232426361609 + 259057586529 = 1110147^2 + 508977^2 .

It is not an unprimeable number, because it can be changed into a prime (1491483948137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 41430109653 + ... + 41430109688.

Almost surely, 2^{1491483948138} is an apocalyptic number.

1491483948138 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1491483948138 is an abundant number, since it is smaller than the sum of its proper divisors (1740064606200).

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

1491483948138 is a wasteful number, since it uses less digits than its factorization.

1491483948138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82860219349 (or 82860219346 counting only the distinct ones).

The product of its digits is 23887872, while the sum is 63.

The spelling of 1491483948138 in words is "one trillion, four hundred ninety-one billion, four hundred eighty-three million, nine hundred forty-eight thousand, one hundred thirty-eight".