69733521664 has 72 divisors (see below), whose sum is σ = 142231249440. Its totient is φ = 34111795200.

The previous prime is 69733521661. The next prime is 69733521673. The reversal of 69733521664 is 46612533796.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (69733521661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3176004 + ... + 3197884.

It is an arithmetic number, because the mean of its divisors is an integer number (1975434020).

Almost surely, 2^69733521664 is an apocalyptic number.

69733521664 is a gapful number since it is divisible by the number (64) 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 69733521664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71115624720).

69733521664 is an abundant number, since it is smaller than the sum of its proper divisors (72497727776).

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

69733521664 is a wasteful number, since it uses less digits than its factorization.

69733521664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22167 (or 22153 counting only the distinct ones).

The product of its digits is 4898880, while the sum is 52.

The spelling of 69733521664 in words is "sixty-nine billion, seven hundred thirty-three million, five hundred twenty-one thousand, six hundred sixty-four".