99218693664 has 120 divisors (see below), whose sum is σ = 294633218880. Its totient is φ = 32751713664.

The previous prime is 99218693663. The next prime is 99218693669. The reversal of 99218693664 is 46639681299.

99218693664 is a `hidden beast` number, since 9 + 92 + 186 + 9 + 366 + 4 = 666.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (99218693663) 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 19 ways as a sum of consecutive naturals, for example, 81157 + ... + 452795.

It is an arithmetic number, because the mean of its divisors is an integer number (2455276824).

Almost surely, 2^99218693664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99218693664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (147316609440).

99218693664 is an abundant number, since it is smaller than the sum of its proper divisors (195414525216).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

99218693664 is a wasteful number, since it uses less digits than its factorization.

99218693664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 371764 (or 371747 counting only the distinct ones).

The product of its digits is 30233088, while the sum is 63.

The spelling of 99218693664 in words is "ninety-nine billion, two hundred eighteen million, six hundred ninety-three thousand, six hundred sixty-four".