88561645 has 4 divisors (see below), whose sum is σ = 106273980. Its totient is φ = 70849312.

The previous prime is 88561643. The next prime is 88561663. The reversal of 88561645 is 54616588.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 50381604 + 38180041 = 7098^2 + 6179^2 .

It is a cyclic number.

It is not a de Polignac number, because 88561645 - 2¹ = 88561643 is a prime.

It is a super-3 number, since 3×88561645³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (88561643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8856160 + ... + 8856169.

It is an arithmetic number, because the mean of its divisors is an integer number (26568495).

Almost surely, 2^88561645 is an apocalyptic number.

It is an amenable number.

88561645 is a deficient number, since it is larger than the sum of its proper divisors (17712335).

88561645 is a wasteful number, since it uses less digits than its factorization.

88561645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17712334.

The product of its digits is 230400, while the sum is 43.

The square root of 88561645 is about 9410.7196855501. The cubic root of 88561645 is about 445.7402903246.

It can be divided in two parts, 8856 and 1645, that added together give a palindrome (10501).

The spelling of 88561645 in words is "eighty-eight million, five hundred sixty-one thousand, six hundred forty-five".