91063765475428 has 72 divisors (see below), whose sum is σ = 166601636119800. Its totient is φ = 43547962752000.

The previous prime is 91063765475383. The next prime is 91063765475489. The reversal of 91063765475428 is 82457456736019.

It can be written as a sum of positive squares in 4 ways, for example, as 4324494929764 + 86739270545664 = 2079542^2 + 9313392^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 151295478 + ... + 151896178.

It is an arithmetic number, because the mean of its divisors is an integer number (2313911612775).

It is a 1-persistent number, because it is pandigital, but 2⋅91063765475428 = 182127530950856 is not.

Almost surely, 2^{91063765475428} is an apocalyptic number.

It is an amenable number.

91063765475428 is a deficient number, since it is larger than the sum of its proper divisors (75537870644372).

91063765475428 is a wasteful number, since it uses less digits than its factorization.

91063765475428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 601229 (or 601196 counting only the distinct ones).

The product of its (nonzero) digits is 304819200, while the sum is 67.

The spelling of 91063765475428 in words is "ninety-one trillion, sixty-three billion, seven hundred sixty-five million, four hundred seventy-five thousand, four hundred twenty-eight".