39641942131 has 4 divisors (see below), whose sum is σ = 43245755064. Its totient is φ = 36038129200.

The previous prime is 39641942113. The next prime is 39641942143. The reversal of 39641942131 is 13124914693.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13124914693 = 11 ⋅1193174063.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39641942131 is a prime.

It is a super-2 number, since 2×39641942131² (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 (39641942101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1801906450 + ... + 1801906471.

It is an arithmetic number, because the mean of its divisors is an integer number (10811438766).

Almost surely, 2^39641942131 is an apocalyptic number.

39641942131 is a deficient number, since it is larger than the sum of its proper divisors (3603812933).

39641942131 is a wasteful number, since it uses less digits than its factorization.

39641942131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3603812932.

The product of its digits is 139968, while the sum is 43.

The spelling of 39641942131 in words is "thirty-nine billion, six hundred forty-one million, nine hundred forty-two thousand, one hundred thirty-one".