86728621637 has 8 divisors (see below), whose sum is σ = 101797301376. Its totient is φ = 72329661072.

The previous prime is 86728621631. The next prime is 86728621649. The reversal of 86728621637 is 73612682768.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 86728621637 - 2¹⁰ = 86728620613 is a prime.

It is a super-2 number, since 2×86728621637² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86728621631) 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 7 ways as a sum of consecutive naturals, for example, 167429513 + ... + 167430030.

It is an arithmetic number, because the mean of its divisors is an integer number (12724662672).

Almost surely, 2^86728621637 is an apocalyptic number.

It is an amenable number.

86728621637 is a deficient number, since it is larger than the sum of its proper divisors (15068679739).

86728621637 is a wasteful number, since it uses less digits than its factorization.

86728621637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334859587.

The product of its digits is 8128512, while the sum is 56.

The spelling of 86728621637 in words is "eighty-six billion, seven hundred twenty-eight million, six hundred twenty-one thousand, six hundred thirty-seven".