91814769413 has 8 divisors (see below), whose sum is σ = 97432162200. Its totient is φ = 86221434880.

The previous prime is 91814769407. The next prime is 91814769433. The reversal of 91814769413 is 31496741819.

It can be written as a sum of positive squares in 4 ways, for example, as 5730035809 + 86084733604 = 75697^2 + 293402^2 .

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 91814769413 - 2⁶ = 91814769349 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 (91814769433) 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, 6006698 + ... + 6021963.

It is an arithmetic number, because the mean of its divisors is an integer number (12179020275).

Almost surely, 2^91814769413 is an apocalyptic number.

It is an amenable number.

91814769413 is a deficient number, since it is larger than the sum of its proper divisors (5617392787).

91814769413 is a wasteful number, since it uses less digits than its factorization.

91814769413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12029127.

The product of its digits is 1306368, while the sum is 53.

The spelling of 91814769413 in words is "ninety-one billion, eight hundred fourteen million, seven hundred sixty-nine thousand, four hundred thirteen".