68746784907792 has 160 divisors (see below), whose sum is σ = 184254916105216. Its totient is φ = 22064032972800.

The previous prime is 68746784907791. The next prime is 68746784907869. The reversal of 68746784907792 is 29770948764786.

It is a super-2 number, since 2×68746784907792² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (68746784907791) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 391870848 + ... + 392046240.

Almost surely, 2^{68746784907792} is an apocalyptic number.

68746784907792 is a gapful number since it is divisible by the number (62) 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 68746784907792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92127458052608).

68746784907792 is an abundant number, since it is smaller than the sum of its proper divisors (115508131197424).

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

68746784907792 is a wasteful number, since it uses less digits than its factorization.

68746784907792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176769 (or 176763 counting only the distinct ones).

The product of its (nonzero) digits is 14338695168, while the sum is 84.

The spelling of 68746784907792 in words is "sixty-eight trillion, seven hundred forty-six billion, seven hundred eighty-four million, nine hundred seven thousand, seven hundred ninety-two".