87844388893 has 16 divisors (see below), whose sum is σ = 89018496000. Its totient is φ = 86680059840.

The previous prime is 87844388857. The next prime is 87844388927. The reversal of 87844388893 is 39888344878.

It is a cyclic number.

It is not a de Polignac number, because 87844388893 - 2⁹ = 87844388381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87844382893) 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, 14447428 + ... + 14453506.

It is an arithmetic number, because the mean of its divisors is an integer number (5563656000).

Almost surely, 2^87844388893 is an apocalyptic number.

It is an amenable number.

87844388893 is a deficient number, since it is larger than the sum of its proper divisors (1174107107).

87844388893 is a wasteful number, since it uses less digits than its factorization.

87844388893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6852.

The product of its digits is 297271296, while the sum is 70.

The spelling of 87844388893 in words is "eighty-seven billion, eight hundred forty-four million, three hundred eighty-eight thousand, eight hundred ninety-three".