32669738640 has 720 divisors, whose sum is σ = 143939537280. Its totient is φ = 6785856000.

The previous prime is 32669738581. The next prime is 32669738641. The reversal of 32669738640 is 4683796623.

It is a tau number, because it is divible by the number of its divisors (720).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (32669738641) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 12805365 + ... + 12807915.

It is an arithmetic number, because the mean of its divisors is an integer number (199916024).

Almost surely, 2^32669738640 is an apocalyptic number.

32669738640 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 32669738640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71969768640).

32669738640 is an abundant number, since it is smaller than the sum of its proper divisors (111269798640).

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

32669738640 is a wasteful number, since it uses less digits than its factorization.

32669738640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2609 (or 2579 counting only the distinct ones).

The product of its (nonzero) digits is 7838208, while the sum is 54.

The spelling of 32669738640 in words is "thirty-two billion, six hundred sixty-nine million, seven hundred thirty-eight thousand, six hundred forty".