39516949894 has 4 divisors (see below), whose sum is σ = 59275424844. Its totient is φ = 19758474946.

The previous prime is 39516949891. The next prime is 39516949909. The reversal of 39516949894 is 49894961593.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 49894961593 = 29 ⋅1720515917.

It is a super-2 number, since 2×39516949894² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (67) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39516949891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9879237472 + ... + 9879237475.

It is an arithmetic number, because the mean of its divisors is an integer number (14818856211).

Almost surely, 2^39516949894 is an apocalyptic number.

39516949894 is a deficient number, since it is larger than the sum of its proper divisors (19758474950).

39516949894 is a wasteful number, since it uses less digits than its factorization.

39516949894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19758474949.

The product of its digits is 75582720, while the sum is 67.

The spelling of 39516949894 in words is "thirty-nine billion, five hundred sixteen million, nine hundred forty-nine thousand, eight hundred ninety-four".