39806138131 has 8 divisors (see below), whose sum is σ = 40291149600. Its totient is φ = 39321965760.

The previous prime is 39806138087. The next prime is 39806138153. The reversal of 39806138131 is 13183160893.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 39806138131 - 2¹⁹ = 39805613843 is a prime.

It is a super-2 number, since 2×39806138131² (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 (39806138171) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 114055 + ... + 304336.

It is an arithmetic number, because the mean of its divisors is an integer number (5036393700).

Almost surely, 2^39806138131 is an apocalyptic number.

39806138131 is a deficient number, since it is larger than the sum of its proper divisors (485011469).

39806138131 is a wasteful number, since it uses less digits than its factorization.

39806138131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 419549.

The product of its (nonzero) digits is 93312, while the sum is 43.

The spelling of 39806138131 in words is "thirty-nine billion, eight hundred six million, one hundred thirty-eight thousand, one hundred thirty-one".