78835528091 has 8 divisors (see below), whose sum is σ = 80837052240. Its totient is φ = 76858265088.

The previous prime is 78835528073. The next prime is 78835528141. The reversal of 78835528091 is 19082553887.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 78835528091 - 2¹⁸ = 78835265947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78835521091) 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, 6058706 + ... + 6071703.

It is an arithmetic number, because the mean of its divisors is an integer number (10104631530).

Almost surely, 2^78835528091 is an apocalyptic number.

78835528091 is a deficient number, since it is larger than the sum of its proper divisors (2001524149).

78835528091 is a wasteful number, since it uses less digits than its factorization.

78835528091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12130573.

The product of its (nonzero) digits is 4838400, while the sum is 56.

The spelling of 78835528091 in words is "seventy-eight billion, eight hundred thirty-five million, five hundred twenty-eight thousand, ninety-one".