69729806172 has 96 divisors (see below), whose sum is σ = 180262513984. Its totient is φ = 20839680000.

The previous prime is 69729806149. The next prime is 69729806173. The reversal of 69729806172 is 27160892796.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (69729806173) 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 31 ways as a sum of consecutive naturals, for example, 3458922 + ... + 3479022.

Almost surely, 2^69729806172 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 69729806172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90131256992).

69729806172 is an abundant number, since it is smaller than the sum of its proper divisors (110532707812).

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

69729806172 is a wasteful number, since it uses less digits than its factorization.

69729806172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20759 (or 20757 counting only the distinct ones).

The product of its (nonzero) digits is 4572288, while the sum is 57.

The spelling of 69729806172 in words is "sixty-nine billion, seven hundred twenty-nine million, eight hundred six thousand, one hundred seventy-two".