68415475863261 has 32 divisors (see below), whose sum is σ = 96881894830080. Its totient is φ = 42824023704000.

The previous prime is 68415475863257. The next prime is 68415475863289. The reversal of 68415475863261 is 16236857451486.

It is not a de Polignac number, because 68415475863261 - 2² = 68415475863257 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 68415475863192 and 68415475863201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68415475863211) 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, 5511750 + ... + 12930983.

It is an arithmetic number, because the mean of its divisors is an integer number (3027559213440).

Almost surely, 2^{68415475863261} is an apocalyptic number.

It is an amenable number.

68415475863261 is a deficient number, since it is larger than the sum of its proper divisors (28466418966819).

68415475863261 is a wasteful number, since it uses less digits than its factorization.

68415475863261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18443337.

The product of its digits is 232243200, while the sum is 66.

The spelling of 68415475863261 in words is "sixty-eight trillion, four hundred fifteen billion, four hundred seventy-five million, eight hundred sixty-three thousand, two hundred sixty-one".