91396581802 has 16 divisors (see below), whose sum is σ = 140556519432. Its totient is φ = 44546279680.

The previous prime is 91396581799. The next prime is 91396581817. The reversal of 91396581802 is 20818569319.

It can be written as a sum of positive squares in 4 ways, for example, as 26085157081 + 65311424721 = 161509^2 + 255561^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 91396581802.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 369313 + ... + 564964.

Almost surely, 2^91396581802 is an apocalyptic number.

91396581802 is a deficient number, since it is larger than the sum of its proper divisors (49159937630).

91396581802 is a wasteful number, since it uses less digits than its factorization.

91396581802 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 935513.

The product of its (nonzero) digits is 933120, while the sum is 52.

The spelling of 91396581802 in words is "ninety-one billion, three hundred ninety-six million, five hundred eighty-one thousand, eight hundred two".