16645379586 has 64 divisors (see below), whose sum is σ = 37273291776. Its totient is φ = 4912980800.

The previous prime is 16645379579. The next prime is 16645379623. The reversal of 16645379586 is 68597354661.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 367540 + ... + 410336.

It is an arithmetic number, because the mean of its divisors is an integer number (582395184).

Almost surely, 2^16645379586 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16645379586, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18636645888).

16645379586 is an abundant number, since it is smaller than the sum of its proper divisors (20627912190).

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

16645379586 is a wasteful number, since it uses less digits than its factorization.

16645379586 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42967.

The product of its digits is 32659200, while the sum is 60.

The spelling of 16645379586 in words is "sixteen billion, six hundred forty-five million, three hundred seventy-nine thousand, five hundred eighty-six".