68536953986 has 8 divisors (see below), whose sum is σ = 102815376780. Its totient is φ = 34265161728.

The previous prime is 68536953977. The next prime is 68536953997. The reversal of 68536953986 is 68935963586.

It can be written as a sum of positive squares in 2 ways, for example, as 63063765625 + 5473188361 = 251125^2 + 73981^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1631711 + ... + 1673186.

Almost surely, 2^68536953986 is an apocalyptic number.

68536953986 is a deficient number, since it is larger than the sum of its proper divisors (34278422794).

68536953986 is a wasteful number, since it uses less digits than its factorization.

68536953986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3315268.

The product of its digits is 251942400, while the sum is 68.

The spelling of 68536953986 in words is "sixty-eight billion, five hundred thirty-six million, nine hundred fifty-three thousand, nine hundred eighty-six".