39791871442 has 16 divisors (see below), whose sum is σ = 61757573400. Its totient is φ = 19206270720.

The previous prime is 39791871439. The next prime is 39791871479. The reversal of 39791871442 is 24417819793.

39791871442 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Cunningham number, because it is equal to 199479²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 20866091401 + 18925780041 = 144451^2 + 137571^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 262234 + ... + 385162.

Almost surely, 2^39791871442 is an apocalyptic number.

39791871442 is a deficient number, since it is larger than the sum of its proper divisors (21965701958).

39791871442 is a wasteful number, since it uses less digits than its factorization.

39791871442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128541.

The product of its digits is 3048192, while the sum is 55.

The spelling of 39791871442 in words is "thirty-nine billion, seven hundred ninety-one million, eight hundred seventy-one thousand, four hundred forty-two".