139561816 has 16 divisors (see below), whose sum is σ = 262122840. Its totient is φ = 69662400.

The previous prime is 139561813. The next prime is 139561819. The reversal of 139561816 is 618165931.

It is an interprime number because it is at equal distance from previous prime (139561813) and next prime (139561819).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139561813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9706 + ... + 19321.

Almost surely, 2^139561816 is an apocalyptic number.

It is an amenable number.

139561816 is a deficient number, since it is larger than the sum of its proper divisors (122561024).

139561816 is a wasteful number, since it uses less digits than its factorization.

139561816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29634 (or 29630 counting only the distinct ones).

The product of its digits is 38880, while the sum is 40.

The square root of 139561816 is about 11813.6284011306. The cubic root of 139561816 is about 518.7071135785.

The spelling of 139561816 in words is "one hundred thirty-nine million, five hundred sixty-one thousand, eight hundred sixteen".