69689664144 has 75 divisors (see below), whose sum is σ = 201729616473. Its totient is φ = 23226720192.

The previous prime is 69689664137. The next prime is 69689664181. The reversal of 69689664144 is 44146698696.

The square root of 69689664144 is 263988.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 474368400 + 69215295744 = 21780^2 + 263088^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 9499902 + ... + 9507234.

Almost surely, 2^69689664144 is an apocalyptic number.

69689664144 is the 263988-th square number.

It is an amenable number.

69689664144 is an abundant number, since it is smaller than the sum of its proper divisors (132039952329).

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

69689664144 is an frugal number, since it uses more digits than its factorization.

69689664144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14686 (or 7338 counting only the distinct ones).

The product of its digits is 53747712, while the sum is 63.

The spelling of 69689664144 in words is "sixty-nine billion, six hundred eighty-nine million, six hundred sixty-four thousand, one hundred forty-four".