60091431138 has 54 divisors (see below), whose sum is σ = 137456493057. Its totient is φ = 18970001280.

The previous prime is 60091431083. The next prime is 60091431151. The reversal of 60091431138 is 83113419006.

60091431138 is a `hidden beast` number, since 6 + 0 + 0 + 91 + 431 + 138 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 38648807649 + 21442623489 = 196593^2 + 146433^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=173337.

It is a super-2 number, since 2×60091431138² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

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 26 ways as a sum of consecutive naturals, for example, 19758898 + ... + 19761938.

Almost surely, 2^60091431138 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 60091431138

60091431138 is an abundant number, since it is smaller than the sum of its proper divisors (77365061919).

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

60091431138 is an equidigital number, since it uses as much as digits as its factorization.

60091431138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6128 (or 3065 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The spelling of 60091431138 in words is "sixty billion, ninety-one million, four hundred thirty-one thousand, one hundred thirty-eight".