39858172113 has 4 divisors (see below), whose sum is σ = 53144229488. Its totient is φ = 26572114740.

The previous prime is 39858172093. The next prime is 39858172121. The reversal of 39858172113 is 31127185893.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 31127185893 = 3 ⋅10375728631.

It is not a de Polignac number, because 39858172113 - 2⁶ = 39858172049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39858172163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6643028683 + ... + 6643028688.

It is an arithmetic number, because the mean of its divisors is an integer number (13286057372).

Almost surely, 2^39858172113 is an apocalyptic number.

It is an amenable number.

39858172113 is a deficient number, since it is larger than the sum of its proper divisors (13286057375).

39858172113 is a wasteful number, since it uses less digits than its factorization.

39858172113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13286057374.

The product of its digits is 362880, while the sum is 48.

The spelling of 39858172113 in words is "thirty-nine billion, eight hundred fifty-eight million, one hundred seventy-two thousand, one hundred thirteen".