86811645 has 16 divisors (see below), whose sum is σ = 143688960. Its totient is φ = 44702784.

The previous prime is 86811643. The next prime is 86811649. The reversal of 86811645 is 54611868.

It is not a de Polignac number, because 86811645 - 2¹ = 86811643 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86811643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 99349 + ... + 100218.

It is an arithmetic number, because the mean of its divisors is an integer number (8980560).

Almost surely, 2^86811645 is an apocalyptic number.

It is an amenable number.

86811645 is a deficient number, since it is larger than the sum of its proper divisors (56877315).

86811645 is a wasteful number, since it uses less digits than its factorization.

86811645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199604.

The product of its digits is 46080, while the sum is 39.

The square root of 86811645 is about 9317.2766943995. The cubic root of 86811645 is about 442.7847571845.

The spelling of 86811645 in words is "eighty-six million, eight hundred eleven thousand, six hundred forty-five".