91328681402 has 8 divisors (see below), whose sum is σ = 156563453856. Its totient is φ = 39140863452.

The previous prime is 91328681401. The next prime is 91328681429. The reversal of 91328681402 is 20418682319.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (91328681401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3261738608 + ... + 3261738635.

It is an arithmetic number, because the mean of its divisors is an integer number (19570431732).

Almost surely, 2^91328681402 is an apocalyptic number.

91328681402 is a deficient number, since it is larger than the sum of its proper divisors (65234772454).

91328681402 is a wasteful number, since it uses less digits than its factorization.

91328681402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6523477252.

The product of its (nonzero) digits is 165888, while the sum is 44.

The spelling of 91328681402 in words is "ninety-one billion, three hundred twenty-eight million, six hundred eighty-one thousand, four hundred two".