69405394656 has 144 divisors (see below), whose sum is σ = 197342342064. Its totient is φ = 21232275456.

The previous prime is 69405394637. The next prime is 69405394661. The reversal of 69405394656 is 65649350496.

It is a super-2 number, since 2×69405394656² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 69405394596 and 69405394605.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 48432916 + ... + 48434348.

It is an arithmetic number, because the mean of its divisors is an integer number (1370432931).

Almost surely, 2^69405394656 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 69405394656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98671171032).

69405394656 is an abundant number, since it is smaller than the sum of its proper divisors (127936947408).

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

69405394656 is a wasteful number, since it uses less digits than its factorization.

69405394656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1853 (or 1648 counting only the distinct ones).

The product of its (nonzero) digits is 20995200, while the sum is 57.

The spelling of 69405394656 in words is "sixty-nine billion, four hundred five million, three hundred ninety-four thousand, six hundred fifty-six".