139431516686 has 32 divisors (see below), whose sum is σ = 269746606080. Its totient is φ = 52450725600.

The previous prime is 139431516667. The next prime is 139431516761. The reversal of 139431516686 is 686615134931.

It is a super-2 number, since 2×139431516686² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15605870 + ... + 15614801.

It is an arithmetic number, because the mean of its divisors is an integer number (8429581440).

Almost surely, 2^139431516686 is an apocalyptic number.

139431516686 is a deficient number, since it is larger than the sum of its proper divisors (130315089394).

139431516686 is a wasteful number, since it uses less digits than its factorization.

139431516686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31220720.

The product of its digits is 2799360, while the sum is 53.

The spelling of 139431516686 in words is "one hundred thirty-nine billion, four hundred thirty-one million, five hundred sixteen thousand, six hundred eighty-six".