86745555 has 48 divisors (see below), whose sum is σ = 164062080. Its totient is φ = 42142464.

The previous prime is 86745551. The next prime is 86745557. The reversal of 86745555 is 55554768.

It is not a de Polignac number, because 86745555 - 2² = 86745551 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 86745555.

It is not an unprimeable number, because it can be changed into a prime (86745551) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 45277 + ... + 47153.

It is an arithmetic number, because the mean of its divisors is an integer number (3417960).

Almost surely, 2^86745555 is an apocalyptic number.

86745555 is a deficient number, since it is larger than the sum of its proper divisors (77316525).

86745555 is a wasteful number, since it uses less digits than its factorization.

86745555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1980 (or 1977 counting only the distinct ones).

The product of its digits is 840000, while the sum is 45.

The square root of 86745555 is about 9313.7293819393. The cubic root of 86745555 is about 442.6723641451.

The spelling of 86745555 in words is "eighty-six million, seven hundred forty-five thousand, five hundred fifty-five".