68966778291 has 16 divisors (see below), whose sum is σ = 92360983680. Its totient is φ = 45775368000.

The previous prime is 68966778241. The next prime is 68966778323. The reversal of 68966778291 is 19287766986.

It is not a de Polignac number, because 68966778291 - 2⁷ = 68966778163 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68966778241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1893831 + ... + 1929903.

It is an arithmetic number, because the mean of its divisors is an integer number (5772561480).

Almost surely, 2^68966778291 is an apocalyptic number.

68966778291 is a deficient number, since it is larger than the sum of its proper divisors (23394205389).

68966778291 is a wasteful number, since it uses less digits than its factorization.

68966778291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38866.

The product of its digits is 109734912, while the sum is 69.

The spelling of 68966778291 in words is "sixty-eight billion, nine hundred sixty-six million, seven hundred seventy-eight thousand, two hundred ninety-one".