69381978791 has 8 divisors (see below), whose sum is σ = 69741626064. Its totient is φ = 69023260800.

The previous prime is 69381978769. The next prime is 69381978811. The reversal of 69381978791 is 19787918396.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-69381978791 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (69381978751) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82361 + ... + 381506.

It is an arithmetic number, because the mean of its divisors is an integer number (8717703258).

Almost surely, 2^69381978791 is an apocalyptic number.

69381978791 is a deficient number, since it is larger than the sum of its proper divisors (359647273).

69381978791 is a wasteful number, since it uses less digits than its factorization.

69381978791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 464641.

The product of its digits is 41150592, while the sum is 68.

The spelling of 69381978791 in words is "sixty-nine billion, three hundred eighty-one million, nine hundred seventy-eight thousand, seven hundred ninety-one".