86721689451 has 8 divisors (see below), whose sum is σ = 120656263680. Its totient is φ = 55300787432.

The previous prime is 86721689449. The next prime is 86721689479. The reversal of 86721689451 is 15498612768.

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 86721689451 - 2¹ = 86721689449 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 86721689391 and 86721689400.

It is not an unprimeable number, because it can be changed into a prime (86721689401) 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, 628417971 + ... + 628418108.

It is an arithmetic number, because the mean of its divisors is an integer number (15082032960).

Almost surely, 2^86721689451 is an apocalyptic number.

86721689451 is a deficient number, since it is larger than the sum of its proper divisors (33934574229).

86721689451 is a wasteful number, since it uses less digits than its factorization.

86721689451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1256836105.

The product of its digits is 5806080, while the sum is 57.

The spelling of 86721689451 in words is "eighty-six billion, seven hundred twenty-one million, six hundred eighty-nine thousand, four hundred fifty-one".