86451656 has 8 divisors (see below), whose sum is σ = 162096870. Its totient is φ = 43225824.

The previous prime is 86451643. The next prime is 86451661. The reversal of 86451656 is 65615468.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 85858756 + 592900 = 9266^2 + 770^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5403221 + ... + 5403236.

Almost surely, 2^86451656 is an apocalyptic number.

It is an amenable number.

86451656 is a deficient number, since it is larger than the sum of its proper divisors (75645214).

86451656 is a wasteful number, since it uses less digits than its factorization.

86451656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10806463 (or 10806459 counting only the distinct ones).

The product of its digits is 172800, while the sum is 41.

The square root of 86451656 is about 9297.9382660889. The cubic root of 86451656 is about 442.1718652157.

It can be divided in two parts, 8645 and 1656, that added together give a palindrome (10301).

The spelling of 86451656 in words is "eighty-six million, four hundred fifty-one thousand, six hundred fifty-six".