91814769412 has 6 divisors (see below), whose sum is σ = 160675846478. Its totient is φ = 45907384704.

The previous prime is 91814769407. The next prime is 91814769433. The reversal of 91814769412 is 21496741819.

It can be written as a sum of positive squares in only one way, i.e., 63633089536 + 28181679876 = 252256^2 + 167874^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 91814769412.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11476846173 + ... + 11476846180.

Almost surely, 2^91814769412 is an apocalyptic number.

It is an amenable number.

91814769412 is a deficient number, since it is larger than the sum of its proper divisors (68861077066).

91814769412 is a wasteful number, since it uses less digits than its factorization.

91814769412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22953692357 (or 22953692355 counting only the distinct ones).

The product of its digits is 870912, while the sum is 52.

The spelling of 91814769412 in words is "ninety-one billion, eight hundred fourteen million, seven hundred sixty-nine thousand, four hundred twelve".