91892040770 has 16 divisors (see below), whose sum is σ = 168526536120. Its totient is φ = 36063291264.

The previous prime is 91892040761. The next prime is 91892040791. The reversal of 91892040770 is 7704029819.

It is a Cunningham number, because it is equal to 303137²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 91892040769 + 1 = 303137^2 + 1^2 .

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, 86690075 + ... + 86691134.

Almost surely, 2^91892040770 is an apocalyptic number.

91892040770 is a deficient number, since it is larger than the sum of its proper divisors (76634495350).

91892040770 is a wasteful number, since it uses less digits than its factorization.

91892040770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173381269.

The product of its (nonzero) digits is 254016, while the sum is 47.

The spelling of 91892040770 in words is "ninety-one billion, eight hundred ninety-two million, forty thousand, seven hundred seventy".